Quote:
Originally Posted by SkiRideDrive
Hey there.
I was pondering the least expensive way to get a bit more volume out of the NPP muffler when in full open mode. Some aftermarket companies have solutions in the 1200 dollar range and some folks have replaced the suitcase with aftermarket mufflers, etc.
I'm not sure if there is enough clearance under the car, but was thinking that maybe adding pipe to bypass the muffler for each valve could give a bit more volume for minimal investment. This would also allow the car to remain quiet in stealth mode. I have a super quality MS Paint drawing below with black lines showing where the theoretical bypass pipes would go.
Any thoughts?
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I plan on doing that to my 18 1le in couple weeks.. gonna cut out and replace the crushed section and then y off that and bypass the muffler and tie back in right at elbo of npp valve.. the npp only sounds good when higher throttle because more pressure going through muffler allows more to make it by the baffled holes inside muffler. Under lighter load a good amount of exhaust is going through the baffles holes rather then making it all the way through to npp valve side... test it, when ur cars idling with valves open, cover both of the inner pipes and u can feel how much pressure is going through muffler rather then valve side... I’ll b sure to post a good before after video when it’s done tho