Club Cobra - Cobra exhaust HELP!!!!

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Cobra exhaust HELP!!!!

Hi guys,

I just had a killer 427 built for my Contemporary Cobra. It made 565 hp and 597 ft/lbs on the dyno using their optimized exhaust system. I had them run it again with my standard Contemporary exhaust (427 S/C side pipes) and lost an even *100* horsepower!!!!!! :CRY:

They then looked closely at the system, and found that the headers are fine, the collector is great, but then the glass pack muffler necks down to a measly two inches inside the great hulking pipe. They had two other sets of Cobra sidepipes in the shop, both of which utilized MUCH more efficient mufflers (spiral wound with a larger inner diameter) but for some reason they couldn't attach the pipes to my headers.

PLEASE let me know if you have any ideas as to what to do? I suppose if I could find a suitable insert, I could have my sidepipes cut open and new inserts installed. Failing that, does anybody have any recommendations for better sidepipes that I could buy? I would prefer to be able to use my existing header pipes, especially since the system is Jet-Hot coated...

Thanks!

There's not much you are going to be able to do unless you want to cut it. The easiest thing is to cut out the old muffler and get a new high flow one. There are people on here that have different ones and can recommend.

Matt

If you look in my gallery you can see how I removed the super-restrictive mufflers. I cut the collector & used a stainless band clamp to re-attach the new pipe which by the way is a 4"dia. diesel truck stack. You could attach any muffler you want or put baffles in the pipes. But what I like best is there's no 3-bolt collector. Works for me. I tried posting the pic. here but I can't figure how. With no other modifications my car picked up 4.5mph at the dragstrip, and I can re-attach those quiet muffs in no time...if for some odd reason I wanted.

Find a decent muffler shop.
Have them cut out the middle section (where it gets fatter) of the sidepipe and replace it with a better muffler.