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2003 Lexus GS300 Catalytic Converter

Review Fitment Notes

We have 25 catalytic converter products to choose from for your 2003 Lexus GS300, and our low-cost options range from $105.98 up to $1,411.58

Showing 25 of 25 Results
Eastern Catalytic Exhaust Manifold with Integrated Catalytic Converter - Front 7538-05456586 Click to Enlarge
5 Stars
Eastern Catalytic 40486
Exhaust Manifold with Integrated Catalytic Converter
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Eastern Catalytic Exhaust Manifold with Integrated Catalytic Converter - Front
Part Number: 7538-05456586
Brand: Eastern Catalytic
Notes: DIRECT FIT -- Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
  • Federal / EPA Direct-fit Manifold Converter Assembly
Position: Front
Condition: New
Shipping Options: Ground
5 Year / 50,000 Mile Eastern Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$845.43
(2) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Catco Exhaust Manifold with Integrated Catalytic Converter 7538-07379851 Click to Enlarge
5 Stars
Catco 4276
Exhaust Manifold with Integrated Catalytic Converter
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Catco Exhaust Manifold with Integrated Catalytic Converter
Part Number: 7538-07379851
Brand: Catco
Notes: Catalytic Converter with Integrated Exhaust Manifold -- Direct Fit; Manifold Unit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$485.98
(12) In Stock
This Part Fits:
Catalog: P
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Bosal Exhaust Manifold with Integrated Catalytic Converter 7538-05378810 Click to Enlarge
4.5 Stars
Bosal 096-1640
Exhaust Manifold with Integrated Catalytic Converter
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Bosal Exhaust Manifold with Integrated Catalytic Converter
Part Number: 7538-05378810
Brand: Bosal
Notes: BRExhaust Federal Direct-Fit Premium Load OBDII Exhaust Manifold with Integrated Catalytic Converter
Condition: New
Body Material: Stainless Steel
Mounting Hardware Included: Yes
Material: Stainless Steel
Type: Federal / EPA Compliant
Type: Direct-Fit
Shipping Options: Ground
5 Year / 25,000 Mile Bosal Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$875.43
(7) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Dorman Exhaust Manifold with Integrated Catalytic Converter 7538-05470950 Click to Enlarge
3 Stars
Dorman 673-642
Exhaust Manifold with Integrated Catalytic Converter
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Dorman Exhaust Manifold with Integrated Catalytic Converter
Part Number: 7538-05470950
Brand: Dorman
Notes: Catalytic Converter with Integrated Exhaust Manifold -- CARB Compliant: Yes
  • Designed to match the fit and performance of the original equipment
  • Includes gaskets and downpipe hardware to simplify installation
  • Made within strict tolerances for reliable longevity
Condition: New
Color: Natural
Grade Type: Regular
Package Contents: Exhaust Manifold; 1 Input Gasket; 1 Output Flange
Shipping Options: Ground
Lifetime Dorman Limited Warranty
*** Legal in California, Colorado, New York, and Maine ***
$923.43
(1) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Magnaflow Exhaust Manifold with Integrated Catalytic Converter - Front 7538-03389403 Click to Enlarge
Website Reviews
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Magnaflow Exhaust Manifold with Integrated Catalytic Converter - Front
Part Number: 7538-03389403
Brand: Magnaflow
Notes: Exhaust Manifold with Integrated Catalytic Converter CALIFORNIA CONVERTERS -- Certification Level : LEV1 LEV; CARB Executive Order D-193-124; Engine Family Number 3TYXV03.0FFF
Position: Front
Condition: New
Series: California
Body Material: Stainless Steel
Material: Stainless Steel
Shipping Options: Free Ground Shipping
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$1,391.00
with FREE Shipping
(2) In Stock
This Part Fits:
Catalog: F
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Walker Exhaust Manifold with Integrated Catalytic Converter 7538-05305477 Click to Enlarge
Website Reviews
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Walker Exhaust Manifold with Integrated Catalytic Converter
Part Number: 7538-05305477
Brand: Walker
Notes: EPA -- Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Ultra Type
  • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
  • DIRECT-FIT DESIGN -- Bolt-off, bolt-on OE-style converter with integrated manifold assemblies that attach directly to engine cylinder head and match all downstream connections
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • STRONG AND DURABLE -- Features thick OE-style flanges and manifolds for strength and durability
  • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE -- Backed by Walker's 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
Condition: New
California Air Resources Board (CARB) Certified: No
Converter Body Material: Stainless Steel
California Air Resource Board (CARB) Certified: No
Substrate Material: Ceramic
Shipping Options: Ground
5 Year / 50,000 Mile Walker Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$750.43
(5) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Eastern Catalytic Catalytic Converter - Rear 7538-05082854 Click to Enlarge
Website Reviews
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Eastern Catalytic Catalytic Converter - Rear
Part Number: 7538-05082854
Brand: Eastern Catalytic
Notes: DIRECT FIT -- Undercar; 45" Overall Length; Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
  • Federal / EPA Direct-fit Converter Assembly
Position: Rear
Condition: New
Shipping Options: Ground
5 Year / 50,000 Mile Eastern Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$436.43
(1) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Eastern Catalytic Catalytic Converter - Rear 7538-05171284 Click to Enlarge
4.9 Stars
Eastern Catalytic 83166
Catalytic Converter
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Eastern Catalytic Catalytic Converter - Rear
Part Number: 7538-05171284
Brand: Eastern Catalytic
Notes: UNIVERSAL -- Undercar; Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
  • Federal / EPA Semi-Universal Converter - ECO II
Position: Rear
Condition: New
Shipping Options: Ground
5 Year / 50,000 Mile Eastern Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$153.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Eastern Catalytic Catalytic Converter - Rear 7538-05171283 Click to Enlarge
4.8 Stars
Eastern Catalytic 83165
Catalytic Converter
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Eastern Catalytic Catalytic Converter - Rear
Part Number: 7538-05171283
Brand: Eastern Catalytic
Notes: UNIVERSAL -- Undercar; Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
  • Federal / EPA Semi-Universal Converter - ECO II
Position: Rear
Condition: New
Shipping Options: Ground
5 Year / 50,000 Mile Eastern Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$153.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Catco Catalytic Converter - Rear 7538-07326311 Click to Enlarge
3 Stars
Catco 4440
Catalytic Converter
Loading Reviews...
Catco Catalytic Converter - Rear
Part Number: 7538-07326311
Brand: Catco
Notes: Catalytic Converter -- Direct Fit; With 42" Converter; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Position: Rear
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$248.98
(5) In Stock
This Part Fits:
Catalog: P
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Catco Catalytic Converter - Rear 7538-07620148 Click to Enlarge
5 Stars
Catco 2538
Catalytic Converter
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Catco Catalytic Converter - Rear
Part Number: 7538-07620148
Brand: Catco
Notes: Catalytic Converter -- Universal; 45" Overall Length Converter, Rear; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Position: Rear
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$105.98
(5) In Stock
This Part Fits:
Catalog: P
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Catco Catalytic Converter - Rear 7538-07620148 Click to Enlarge
5 Stars
Catco 2538
Catalytic Converter
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Catco Catalytic Converter - Rear
Part Number: 7538-07620148
Brand: Catco
Notes: Catalytic Converter -- Universal; With 42" Converter; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Position: Rear
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$105.98
(5) In Stock
This Part Fits:
Catalog: P
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Catco Catalytic Converter W0133-2332884 Click to Enlarge
Website Reviews
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Catco Catalytic Converter
Part Number: W0133-2332884
Brand: Catco
Notes: EPA Standard Load Direct Fit
Detailed Notes: EPA Federal Compliant - Standard Loading Catalyst - Not Legal for sale or use in California. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only.
Condition: New
Shipping Options: Ground, Overnight, 2 Day
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
List Price:
$1,829.10
Our Price: $384.58
(1) In Stock
This Part Fits:
Catalog: A
Vehicle
2003 Lexus GS300
Bosal Catalytic Converter 7538-05100835 Click to Enlarge
Website Reviews
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Bosal Catalytic Converter
Part Number: 7538-05100835
Brand: Bosal
Notes: BRExhaust Federal Direct-Fit Standard Load OBDII Catalytic Converter
Condition: New
Finish: Stainless Steel
Material: Stainless Steel
Type: Federal / EPA Compliant
Type: Direct-Fit
Body Material: Stainless Steel
Mounting Hardware Included: Yes
Shipping Options: Ground
5 Year / 25,000 Mile Bosal Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$445.43
(2) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Bosal Catalytic Converter 7538-05792816 Click to Enlarge
5 Stars
Bosal 093-2030
Catalytic Converter
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Bosal Catalytic Converter
Part Number: 7538-05792816
Brand: Bosal
Notes: BRExhaust Federal Universal Standard Load OBDII Catalytic Converter -- Cutting and Welding Required During Installation
Condition: New
Shipping Options: Ground
5 Year / 25,000 Mile Bosal Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$167.43
(1) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Bosal Catalytic Converter - Front W0133-1924452 Click to Enlarge
Website Reviews
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Bosal Catalytic Converter - Front
Part Number: W0133-1924452
Brand: Bosal
Notes: EPA Compliant - (48-State & Canada) EPA Tier 0 & Tier 1 emission use.
Detailed Notes: Not legal for sale or use in California and New York
Product Remark: - w/Manifold
  • Full Machined Flanges
  • OE Fittings for Easy Installation
  • Silent Flex Tubes
  • Stainless Steel Quality Assembly
  • Assured Fit
Position: Front
Condition: New
Shipping Options: Ground Shipping
5 Year / 25,000 Mile Bosal Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
List Price:
$1,047.37
Our Price: $943.58
(5) In Stock
This Part Fits:
Catalog: A
Vehicle
2003 Lexus GS300
API Catalytic Converter 7538-07922710 Click to Enlarge
Website Reviews
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API Catalytic Converter
Part Number: 7538-07922710
Brand: API
Notes: EPA Compliant -- Exact-Fit; Not Legal For Sale For Vehicles Registered In California, NY, and ME; Front Pipe With Cat (45" long)
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$285.98
(4) In Stock
This Part Fits:
Catalog: P
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Magnaflow Catalytic Converter - Rear 7538-05639989 Click to Enlarge
Website Reviews
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Magnaflow Catalytic Converter - Rear
Part Number: 7538-05639989
Brand: Magnaflow
Notes: 2.50in. Universal California OBDII Catalytic Converter -- Certification Level : LEV1 LEV; OE Spec; Cutting and Welding Required During Installation; CARB Executive Order D-193-124; Engine Family Number 3TYXV03.0FFF
Position: Rear
Condition: New
Body Material: Stainless Steel
Material: Stainless Steel
Series: California
Heat Shield Included: Yes
Shipping Options: Ground
*** Legal in California, Colorado, New York, and Maine ***
$313.43
(3) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Magnaflow Catalytic Converter 7538-03847617 Click to Enlarge
5 Stars
Magnaflow 99006HM
Catalytic Converter
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Magnaflow Catalytic Converter
Part Number: 7538-03847617
Brand: Magnaflow
Notes: Universal HM Grade Federal (Exc. CA) -- Cutting and Welding Required During Installation
Condition: New
Material: Stainless Steel
Body Material: Stainless Steel
Universal Or Specific Fit: Universal
Series: HM Grade
Heat Shield Included: Yes
Shipping Options: Free Ground Shipping
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$233.00
with FREE Shipping
(67) In Stock
This Part Fits:
Catalog: F
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Magnaflow Catalytic Converter 7538-03328119 Click to Enlarge
Website Reviews
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Magnaflow Catalytic Converter
Part Number: 7538-03328119
Brand: Magnaflow
Notes: Universal OEM GRADE Federal (Exc.CA) -- Cutting and Welding Required During Installation
Condition: New
Series: OEM Grade
Body Material: Stainless Steel
Material: Stainless Steel
Heat Shield Included: Yes
Shipping Options: Free Ground Shipping
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$241.00
with FREE Shipping
(28) In Stock
This Part Fits:
Catalog: F
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
DEC Catalytic Converter - Rear W0133-1903205 Click to Enlarge
Website Reviews
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DEC Catalytic Converter - Rear
Part Number: W0133-1903205
Brand: DEC
Notes: 46" Overall length C.A.R.B Compliant - California/New York Engine Family Number 3TYXV03.0FFF - Tier: LEV
Detailed Notes: C.A.R.B Certified and legal for sale and use in California and New York
  • Full Machined Flanges
  • OE Fittings for Easy Installation
  • Silent Flex Tubes
  • Stainless Steel Quality Assembly
  • Assured Fit
Position: Rear
Condition: New
Shipping Options: Ground Shipping
5 Year / 50,000 Mile DEC Limited Warranty
*** Legal in California, Colorado, New York, and Maine ***
List Price:
$886.40
Our Price: $682.58
(4) In Stock
This Part Fits:
Catalog: A
Vehicle
2003 Lexus GS300
DEC Catalytic Converter - Front W0133-2077998 Click to Enlarge
Website Reviews
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DEC Catalytic Converter - Front
Part Number: W0133-2077998
Brand: DEC
Notes: C.A.R.B Compliant - California/New York Engine Family Number 3TYXV03.0FFF - Tier: LEV1 LEV
Detailed Notes: C.A.R.B Certified and legal for sale and use in California and New York
Product Remark: - w/Manifold
  • Full Machined Flanges
  • OE Fittings for Easy Installation
  • Silent Flex Tubes
  • Stainless Steel Quality Assembly
  • Assured Fit
Position: Front
Condition: New
Shipping Options: Ground, Overnight, 2 Day
5 Year / 50,000 Mile DEC Limited Warranty
*** Legal in California, Colorado, New York, and Maine ***
List Price:
$1,613.19
Our Price: $1,411.58
(6) In Stock
This Part Fits:
Catalog: A
Vehicle
2003 Lexus GS300
Walker Catalytic Converter - Rear 7538-09199440 Click to Enlarge
Website Reviews
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Walker Catalytic Converter - Rear
Part Number: 7538-09199440
Brand: Walker
Notes: EPA -- Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Ultra Universal Type; Modifications and/or Additional Parts May Be Required for Installation
  • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • DURABLE -- Features stainless-steel body with aluminized pipe and heat shields for durability
  • FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
  • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE -- Backed by Walker's 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
Position: Rear
Condition: New
Body Material: Stainless Steel
California Air Resources Board (CARB) Certified: No
Substrate Material: Ceramic
Air Tube: No
Shipping Options: Ground
5 Year / 50,000 Mile Walker Limited Warranty
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$154.08
(1) In Stock
This Part Fits:
Catalog: H
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
AP Exhaust Catalytic Converter - Rear 7538-05938121 Click to Enlarge
Website Reviews
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AP Exhaust Catalytic Converter - Rear
Part Number: 7538-05938121
Brand: AP Exhaust
Notes: Catalytic Converter -- Direct Fit; (With 42" Overall Length Converter); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Position: Rear
Condition: New
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$396.43
(4) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl
Davico Catalytic Converter - Front 7538-05687300 Click to Enlarge
Website Reviews
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Davico Catalytic Converter - Front
Part Number: 7538-05687300
Brand: Davico
Notes: Exact-Fit Catalytic Converter - Manifold -- Not legal for use in California; Illegal for installation in NY on vehicles equipped with California emission systems; Manifold Converter
Position: Front
Condition: New
Gaskets Included: No
Shipping Options: Ground
{We currently do not ship this catalytic converter to California, Colorado, New York, or Maine}
$575.43
(1) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 Lexus GS300 3.0L 6 Cyl

Catalytic Converter Reviews - 2003 Lexus GS300

Bosal | 096-1640

The CAT works well, and for the price is difficult to beat.

However, the install was not a direct swap as the manifold flange that bolts to the head was too tight of a fit but was easily modified to work. Additionally, the bracket that comes off of the bottom of the transmission has to be cut or drilled out to make it work like it did with the OEM CATS.

And as far as aftermarket low cost CATs go, this was one of the better ones.

February 3rd, 2014 | Posted by Rocket