From: Walt Konecny [wkonecny@uswest.net] Sent: Tuesday, July 18, 2000 12:38 PM To: 928 Subject: [928] Re: Cat bypass Installed..you were right Chris! ----- Original Message ----- From: Subject: [928] Re: Cat bypass Installed..you were right Chris! > Did you notice a big hp/tq difference? > > Todd Last year we dyno'd an 87 S4 (auto, 72,400 miles) to determine simple (cheap) exhaust and intake mods: Stock exhaust with RMB: +6.9 hp +1.5 torque Stock exhaust with Cat bypass: +12.6 hp +4.8 torque Stock exhaust with RMB and Cat bypass: +16.1 hp +5.1 torque "Stock exhaust" simply means that nothing except the listed items were changed. The numbers are changes in the peak recorded numbers. Even though the Cat bypass shows an increase in peak torque, the first part of the torque band actually showed approx a 6 lb/ft loss. BTW, K&N filter makes no difference whatsoever when compared to a clean OEM filter (except lets more fine dust into your cylinders). wk