is it worth adding a H pipe section to a exhaust system?. stock system runs a H pipe and a resonator on each side. im currently running split 3" system no h or x pipe or centre muff. i want to quieten it down.. whats the best way . will joining both banks quieten up my system or do is it the resonators that really make a difference.. ??
Have you got cats? They make a pretty big difference to noise and smooth the note a bit, obviously they're restrictive but that's why they work.
It won't be quieter as in less DBA unless you far a UAS type x pipe that incorporates a muffler. It WILL be less resonant as the harmonic pulses cancel each other out.
Or you could try some of these mufflers which I use on my race car .. http://www.spintechmufflers.com/mufflers/street-mufflers/cat_14.html A pair of 3" in/out with 4" high, 9" wide and 14" long cuts the exhaust noise from my 14.5:1 E85 race engine down to 93.5 Dba on the CAMS drive-by test at Sandown or PI. Their road versions let you keep the bass sound ("note") but drop the absolute noise level. Their road mufflers will satisfy a 75Dba CAMS drive-by test.
Yeh deffinately have cats . So resonators might be the go ? currently running magna flow mufflers 14835 muffs Inlet/Outlet Size: 3in./4in. Body Shape: 5in.x8in. Oval Core Size: 3in. Body Length: 14in.
Resonators cut harmonics (drone). Mufflers cut DBA. Which do you want? X pipe/H pipe is probably a good idea in any case as it will prolong the life of your turbo seals.
'H' pipe will only drop the drone down slightly, and has a very minor effect on DB levels ... Fitting a pair of 10inch hotdog mufflers will take away a slightly bigger chunk of the drone over an 'H' pipe but still wont cancel it out to a tolerable level, they will also drop the DB level down noticeably by removing the exhaust crackles a 'H' pipe and hotdogs combination still wont get the drone down enough, you'll still have it at its worst at the 100kph mark and it wont dissipate until ~110kph, again you'll have a slightly quieter exhaust and no crackles An 'X' pipe will cancel out the drone, it also will NOT alter the DB reading I currently run 2X 10inch doggies and and a 2inch 'H' pipe with my 2.5inch stainless system with mandrel bends..... the drone drives most passengers nuts.... but being a deaf-old-fart.... I couldn't give a shyte about them, I can barely hear it and when I can a slight squeeze on the throttle gets rid of it :br: I had an 'x' pipe..... didn't sound right to me
I am running 2.5" exhaust and a x-over, the drone got of my nerves, last week I had a couple of Hot Dogs added to the system, certainly took out the droning..$250..
