# racing in Montreal, Canada 3-25-09 **URL:** \ **Category:** Shift518 Automotive\ **Created:** [March 26, 2009, 10:04am UTC](https://forums.speedlife.net/t/racing-in-montreal-canada-3-25-09/243092 "2009-03-26T10:04:32Z")\ **Posts on this page:** 1\ **Showing post:** 38
**Author:** ![kramerbuccs24](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kramerbuccs24/32/6397_2.png) [@kramerbuccs24](https://forums.speedlife.net/u/kramerbuccs24)\ **Post date:** [March 26, 2009, 9:32pm UTC](https://forums.speedlife.net/t/racing-in-montreal-canada-3-25-09/243092/38 "2009-03-26T21:32:10Z")
> [@\*\*\*\*\*Official: Mighty Meet Thread\*\*\*\*\*](https://forums.speedlife.net/t/official-mighty-meet-thread/10918/644): > > i want to see flow tests of how restrictive this exhaust is, or you claim it is. i can see if you went from dumps, to a full exhaust. id be more concerned with that awesome y-pipe system. whats the diameter of the stock exhaust?? an NA car doesnt have nearly the effect on the exhaust as a turbo car does(you have headers, and ypipe, plafs car seems to do just fine all around with a header/ypipe/stock catback combo)… **na cars need back pressure** while turbos create it. this comment is always sure to start a debate :lol --- _[View the full topic](https://forums.speedlife.net/t/racing-in-montreal-canada-3-25-09/243092)._