C7 Corvette GS/Z06/ZR1 Ultimate NPP

Ultimate means ultimate. Larger diameter than any "extreme" system on the market.

The INSIDE diameter of this exhaust is the OUTSIDE diameter of a 3" exhaust. Essentially larger than 3" straight pipes.  

If you purchase the exhaust without our headers, you will need to use adapter sleeves that will be included. 

Compatible with the OEM NPP control or vacuum control for non-NPP cars.