C7 Corvette GS/Z06/ZR1 - Catback Ultimate NPP Valve Control:Vacuum Valve Control Equal Length 8-4-1 Headers (now

Equal Length 8-4-1 Headers (now with double slip joints $$$)

First pre-order sold out

C5 Ultimate NPP- Dual 3" vacuum controlled

Automatic version is experimental in regards to header lengths

C7 Corvette GS/Z06/ZR1 - Catback Ultimate NPP Valve Control:Vacuum Valve Control Equal Length 8-4-1 Headers (nowUltimate 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.