jamesvfr Posted April 26, 2010 Share Posted April 26, 2010 Hi all Got to build a new exhaust system for my triller, system that was on it was quite nasty but worked so i left it but the tin work has eaten it beyond repair Its got a 3.9 in it Any one suggest best exhaust diameter for primaries + after it joins to 1? I was thinking 1.75" then 2.5 or 3" Cheers all James Quote Link to comment Share on other sites More sharing options...
wee_arthur Posted April 26, 2010 Share Posted April 26, 2010 For the noise go 3" we have a 3.5 and the noise is fantastic. But when building ours we made sure there was plenty of back pressure by using sharp bends etc. We have a 3.9 ready to go in so hopefully it dounds better Quote Link to comment Share on other sites More sharing options...
p76rangie Posted April 27, 2010 Share Posted April 27, 2010 Hi all Got to build a new exhaust system for my triller, system that was on it was quite nasty but worked so i left it but the tin work has eaten it beyond repair Its got a 3.9 in it Any one suggest best exhaust diameter for primaries + after it joins to 1? I was thinking 1.75" then 2.5 or 3" Cheers all James Would not go any bigger than 2.5 on the 3.9. Either 2.25 or 2.5 are reasonable, definitely not below 2.0 Quote Link to comment Share on other sites More sharing options...
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