No, this is a myth, as dispelled in a recent issue of Sport Compact Car. The cat-back portion of the exhaust system is so far downstream of the exhaust ports that the difference in diameter will not have a significant effect on exhaust gas velocity at the ports themselves. The wrong design header will affect low end torque because it will not maintain sufficient exhaust gas velocity at the port to scavenge exhaust gases as well as one with narrower ports (this is why 4-2-1 header design is better for maintaining low-end torque than 4-1 header design).Originally posted by filmnews@Feb 19 2006, 08:05 PM
I have been doing a lot of research on a cat-back exhaust for my car. I have read that Megan and Blitz cat-back exhausts decrease low end torque. So, do aftermarket cat-back exhausts decrease low end torque?
You should not lose low end torque with stock header and a cat-back swap.Originally posted by filmnews@Feb 19 2006, 08:20 PM
I still have the stock header on the car. So, if I only switch out the cat back exhaust, I should not lose any low end torque?
I also hear a lot about back pressure build up with a exhaust bigger then 2.25". Is this true?
Sorry, you canceled out my choice.Originally posted by filmnews@Feb 19 2006, 08:28 PM
EddNog, I have one more question.
What cat back exhaust would you go with? I don't want to spend more then $400. So, that cancels out the magnaflow exhaust. Thanks for the infor. I want a nice deep tone, not ricey!
Yeah well the cat-back I was talking about is fully custom I do not like the magnaflow cat-back that comes from magnaflow cause it removes the resonator my setup which will get done soon is going to keep the resonator and be a full new catback. Its tons better.Originally posted by JDangle@Feb 20 2006, 08:47 AM
go to a muffler shop, get a rubber hangar thats 1/2"-1" longer than the original, and your good. you you can do what i did on my friends for a quick fix just so you can get it installed good until you can make it to a muffler shop. i personally dont really like th magnaflow cause of the welds. not that great of quality (i have seen many) and i just think if a company cut corners on the welds, what else did they cut corners on that will bite me in tha ass down the road? like greddy evos that rust out after a year. (mine and ATLEAST 20 others didp when i had my type-r), not to mention the magnafolw axleback wont give any gains. it doesnt have mandrel bent pipe, and its not stainless (PM and i got into mulitple heated arguements about their mufflers and the quality) im honestly happy for the tc guys who got it and like it, I personaly dont want a exhaust that looks like it got made at mom and pops muffler shop though