The SPD 2014-2021 Toyota 4.6L & 5.7L Tundra High Flow Catted Stainless Downpipes is the ultimate upgrade for your 4.6L or 5.7L.  All of SPD's catted y pipes use the highest grade EPA approved catalytic converters and larger 3" diameter mandrel bent T304 stainless tubing which improves throttle response, mileage and overall performance while reducing back pressure and exhaust temperatures. Our downpipes do not require custom tuning and can be used as a factory y pipe replacement. Our standard catalytic convertors are made in USA and are designed to be used in racing applications. For high horsepower motors, we offer GESI G-Sport 85230 catalytic convertors which will handled up to1600hp. Supercharged trucks will see +35rwhp.  Custom tuning will see higher power gains.  

On all SPD Performance's T304 Stainless Catted Downpipes, you get:

• Increase in performance
• Better fuel mileage
• High flow 400CPSI or GESI G-Sport catalytic converters, that do not cause check engine lights
  
• 3" Large Diameter Mandrel 304 Stainless 
• Larger diameter factory style flanges
• High grade stainless clamps for a solid seal and no leaks
• All gaskets and hardware included

We use EPA approved federal catalytic converters but you are responsible to verify that they are legal with your state and county laws.

We will NOT ship this product to California.

SPD Catted Downpipes with Factory Exhaust

SPD Catted Downpipes with SPD HX Series Equal Length Exhaust