View Full Version : Harley FXDWG supertrapp 2:1 tuning

03-19-2008, 04:27 AM
Howdy MR SCHULTZ I need some advice on sound and performance . I have recently purchased a Harley FXDWG 2003 WIDEGLIDE which has aMikuni carb fitted with a Kurukyin Hypercharger and 2:1 super megs supertrapp exhaust, the exhaust has a closed end and 4 discs and runs well, but sounds a bit poor , how can i beef up the sound without affecting performance. Please help as bike sounds a bit too quiet for A hARLEY.

03-19-2008, 09:41 AM
Only 4 discs? That's pretty restrictive. How does your plugs look?
I would normally suggest using an "open" end-cap for more sound. On the 4" systems the "open" end cap flows for 10-12 discs. So if you installed an "open" end cap with NO discs your flow rate would be doubled (almost tripled), from your existing flow, and would end up running lean.