SPELAB Exhaust Header for 1997-2001 Chevy Blazer GMC Jimmy 4.3L V6 Duramax Downpipe 7L Powerstroke owners upgrading crankcase

7L Powerstroke owners upgrading crankcase ventilation

Bypassing the exhaust flow reduces the power of driving the turbine wheel to match the power required for a given boost level

Go from closed to open or open to closed with just the flip of a switch

0L Powerstroke trucks used for towing

SPELAB Exhaust Header for 1997-2001 Chevy Blazer GMC Jimmy 4.3L V6 Duramax Downpipe 7L Powerstroke owners upgrading crankcaseSPELAB Exhaust Header for 1997, 1998, 1999, 2000, 2001 Chevy Blazer GMC Jimmy 4. 3L V6 Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt on, no modification needed. Fitment: 1997