Headers & exhaust

[Paul Workman]

Originally Posted by emmvette

What's the FBI set-up consist of?

Marc favors the Corsa cat-back, but what Pete and others are using with success (in a fashion) is a "work in progress", but this may come pretty close as of now:

• SW or Watson headers,
• 3" pipes throughout,
• sans cats and resonator,
• SW or B&B type X pipe*,
• Dynamax 17228 or B&B muffs 3" in, twin 2" out
• NPP** valve on one of each twin outlet, OR cut-out valve at the differential
• B&B or C6 Z06 tips.

* Bob G is using what could be described as an X "box"
**NPP valves are controlled by simply supplying vacuum from the plenum to the valves, or manually electrically activated.



Note: The simple vacuum system works well in relatively flat terrain. However, in mountainous areas, the simple plenum vacuum approach results in the valves being open "too much". The fix is what I was alluding to in the next HOTB.

P.