Supercharger vs. N/A build!

[Cobrat24]

Originally Posted by cycleguy55

I'm curious about the use of Borla mufflers between your exhaust manifolds / shorty headers and the side pipes. Obviously short, straight-through mufflers will be much better than catalytic converters, but why not just straight pipes? For that matter, why not go to headers between your engine and the side-pipes?

BTW, which side pipes are those, and have you checked them to see how much restriction is in them?

Perhaps worth checking out is this thread (Classic Roadster exhaust dilemma), the photos starting at post #20 show a re-build of side pipes with new, larger core mufflers to open them up.

Ok so to answer your question, as we all know the existing side pipe setup from the primary's to the collectors are very restrictive, not to mention within the actual sidepipe itself. The idea with this is, headers to high flow borla exhaust and borla to straight pipe no restrictions. This flows better than the exhaust with side pipe setup that is offer currently. I know there are others out there that take care of the sidepipe itself but no one offers an alternative to the collector issues from header to side pipe. If you look at those collectors , a 2 inch primary times 4 is squeezed down to really a 1 inch through that collector.