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OE Quality
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WalkerPart #: 16663
Walker 16663 Catalytic Converter with Integrated Exhaust Manifold - Rear
⚙️ 13 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦EPA, Rear
🚗Fitment: Lexus and Toyota, Highlander, RX350, and Sienna
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Walker 16663 Catalytic Converter with Integrated Exhaust Manifold - Rear
| Brand | Walker |
| Part Number | 16663 |
| Position | EPA, Rear |
| Grade Type | Regular |
| Converter Body Length | 5 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | No |
| Substrate Material | Ceramic |
| Overall Length | 18.71 |
| Converter Body Material | Stainless steel |
| Outlet Port Shape | Round |
| Inlet Port Shape | Round |
| Body Height | 4 |
| Body Height | 4.000 |
| Body Length | 5 |
| Body Length | 5.000 |
| Body Material | Stainless steel |
| Body Shape | 4" round |
| Body Shape | Round |
| Body Width | 4 |
| Body Width | 4.000 |
| Converter Quantity | 1 |
| Fitment | Direct fit |
| Inlet 1 Type | 6 bolt welded flange |
| Inlet Connection Type | 6 bolt welded flange |
| Inlet Count | 1 |
| Inlet Type | 6 bolt welded flange |
| Material | Stainless steel |
| Max Year Covered | 2016 |
| Min Year Covered | 2011 |
| Most Popular Make / Model | Toyota sienna |
| Most Popular Year | 2015 |
This part fits 13 vehicles. Search below:
| Year | Make | Model | Drive Type | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2016 | Toyota | Highlander | 3.5L | V6 | GAS | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2016 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2015 | Lexus | RX350 | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | ||
| 2015 | Toyota | Highlander | 3.5L | V6 | GAS | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2015 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2014 | Lexus | RX350 | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | ||
| 2014 | Toyota | Highlander | 3.5L | V6 | GAS | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2014 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2013 | Lexus | RX350 | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | ||
| 2013 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2012 | Lexus | RX350 | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | ||
| 2012 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA | |
| 2011 | Toyota | Sienna | AWD | 3.5L | V6 | Rear | Fire Wall Side; From 09/2011; 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; Additional Part(s) Needed To Complete Installation: 31332; Ultra Type; EPA |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
5254552548641464641465
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.