Exaust upgrade questions

[Bagoftrix]

Now that I seem to have most of the bugs worked out of my C4 I want to up grade the exaust system. I haven't been able to get under the car yet, but I understand that the factory setup is not a true duel exaust setup. Any suggestions for doing a true duel conversion? Thx...

 

[GWinter]

You have inspection to contend with so I am not so sure you can alter the way the exhaust is set up. It is set up with a cat on each side fairly close to the exhaust manifolds. I believe 2 1/2 in pipe.This feeds into a 3 in cat and then splits back to 2 1/2 pipe with the mufflers way at the back. cat back systems are available from a few diff manufactures.I build my own from 3 in stainless including building the mufflers. Turned out well but the large pipes I believe are the cause of the drone I get inside the car at certain speeds. So if you change the exhaust you may have some unwanted side effects.

 

[Hib Halverson]

The late C4 is a true dual exhaust. It just has a resonator in the middle.

 

[Bagoftrix]

Thanks eveyone!!! I've decided to do what I could being in california, and just get some Flowmasters. Car runs great already, just looking for a little aggression when I step on it...for now!

 

[Wegone]

If your car is an Auto be careful what series of Flowmaster you get some will end up with very bad

• Resonance.

 

[Bagoftrix]

It's a 6 speed. Never considered the transmission.

 

[Wegone]

It's a 6 speed. Never considered the transmission.

You should be good to go as you can always shift out of it

 

[Bagoftrix]

Sorry, this may sound stupid but what do you mean when you say I can always shift out of it.:confused

 

[Wegone]

Sorry, this may sound stupid but what do you mean when you say I can always shift out of it.:confused

Sorry, should have been more clear, If you start to get resonance you can go up or down a gear and change RPM's to stop it. [FONT=Verdana, Tahoma, Calibri, Geneva, sans-serif]Resonance is usually induced at a certain RPM say 1800-2200 that is why it can be worse in an auto as that's about the normal rpm in drive at speed. [/FONT]

 

[GWinter]

The late C4 is a true dual exhaust. It just has a resonator in the middle.

Are you suggesting replacing the 90 with a later exhaust ?