We need a definitive answer.........

[donaisenbrey]

'03's Exhaust.....We need a definitive answer.........

Are the '03's exhaust systems severely restricted at the "H" or at the mufflers?

I have seen posts saying "at the H" and I have seen posts saying "at the Mufflers".

Does anyone know for sure?.............Don

 

[michigancobra]

It's the H. The mufflers are high flow, they
have been since 1990.

 

[Blue03Cobra]

I can't comment on the H, but the cat back (mufflers and tailpipes) is extremely restrictive. The tailpipes are bottled down to something ridiculous like 1 3/4" and have a steel wool-like "baffling" in them. Look closely and you'll see a tip-within-a-tip at the tailpipes. Someone posted a detailed description when they changed their exhaust and I previously posted a pic of the tailpipe assembly...

 

[donaisenbrey]

One vote for the "H" and one for the catback........someone want to break the tie?............Don

 

[92LX5.0]

yeah, I will. I say its the damn cat back doin most of the choking. Or atleast the pipes n tips.............

 

[LIGHTNING LARRY]

:shrug: Why not replace the whole system and have no doubts?:beer:

 

[Black Cobra]

JDM 03 cobra 456rwhp Recipe

Four pounds of boost :
Long Tube Headers
Cat back
Chip
K&N Filter

Notice that they didn't change the stock H pipe.

 

[donaisenbrey]

Why not replace the whole system and have no doubts?

Anwser: $$$$$$$$$....I'm thinking of using a post fix '99-'01 catback...........Don

 

[Yellow Horse]

Don, it's the catback. I have pic's I can post if you are interested. The tips have baffles and the bends are very crude at best. There are a lot of necked down sections.

I looked at my old exhaust a couple of days ago when I was getting my lawn mower out and I noticed there was "2001" painted on one of my mufflers. I didn't notice this before.

 

[SVTyballz]

Originally posted by Black Cobra
JDM 03 cobra 456rwhp Recipe



Notice that they didn't change the stock H pipe.

Once you install long tubes, you have no choice but to change the stock h-pipe. It will not fit.

gary

 

[Black Cobra]

Originally posted by SVTyballz

Once you install long tubes, you have no choice but to change the stock h-pipe. It will not fit.
gary

You're right. I wasn't thinking.

 

[donaisenbrey]

Is the below true?

you just can't mix and match any x-pipe and exhaust when you have a roots type supercharger. You need a certain amount of backpressure in order for it to make its maximum safe horsepower

If so....who is the expert that will tell us exactly what we should put on to free up the restrictions, but yet allow for the proper backpressure?.........Don