My Crossfire brothers, read carefully and weigh the results for yourselves. Let's start with the day to day review. They are louder than a stock exhaust. At the tailpipe you can't tell a difference but in the car you can. I wouldn't say it's a glorious sound, just a bit louder, with more baritone sounds, more whooshier too. Perhaps because it enhances the intake sound, I still need some more time to find a more precise description. It sounds different, but I wouldn't go so far as to say better. On the dyno I saw a huge increase. I dug out my dyno's from the past and my best corrected numbers were 283 hp and 291 torque with the hp dropping off slightly on the top end. These numbers were in 3rd. gear. My former best 1/4 mile on the dyno was 12.724 at 108.3157 mph.
WHAT'S CHANGED. Needswings cork gaskets, Needswings teflon and thermal coated Y pipe and Needswings downpipes.
Best corrected numbers taken in 4th gear. 311 hp and 298 torque. Best dyno 1/4 mile time 12.352 at 109.069 mph. These numbers are with the cutouts closed. The car was hot for each dyno session. (204º on the dashdaq) Today was 83º and the previous best was in the mid 90's with the humidity the same. (raining) I know it's not the most desirable, scientific, in a perfect world comparison but it's more than anyone has posted that I've seen. Were talking 28 hp and 7 torque people. The cats I took off look perfect to me but who knows, perhaps I had a bad cat? I'll let you judge the numbers with the different conditions and different gears used. Some people claim 3rd gear pulls give better numbers than 1 to 1 pulls (4th on out car) but I really don't know. I feel like I've lost some torque below 2000 rpm. I know I'm all over the place with this post so please forgive me. Tomorrow I have time scheduled on the dyno for open cutouts. Stay tuned.
Summary:
283 hp and 291 torque - 12.724 at 108.3157 mph
311 hp and 298 torque - 12.352 at 109.069 mph

Les