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Old 10-06-2012, 02:57 PM   #1
Paul112588
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Default C5 Performance upgrades

I have a 2003 C5 looking to add a custom exhaust and tune which exhaust and tune would you guys recommend for me to get? and How much typical Hp and Torque am I looking to gain from this? thanks....
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Old 10-06-2012, 04:05 PM   #2
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If you are referring to an axle-back or cat-back as people call them, the point is for sound and looks. But a tune will wake the car up. Intake work is more important on these cars. You have an LS6 intake manifold, so that is nice, now do a high flow filter, or look up the flip tie mod, and possibly port the throttle etc. These will give better response and some power gains. If you do an exhaust, do an x-pipe with it to make it worth while.

Brand is just a matter of preference. Everyone will come on here and tell you what they have and why its the best. They are all the same though. If you want sound, look for the small or lack of mufflers. If you want quiet, any systems with full size mufflers will stay quiet.

Last edited by NukeC5; 10-06-2012 at 04:07 PM.
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Old 10-06-2012, 07:47 PM   #3
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If you want to add a little bit of power then long tube headers are the way to go and they will change the sound a little bit making it sound a little more aggressive.
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Old 10-07-2012, 08:25 PM   #4
Greg00Coupe
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IMHO and experience........ adding a lot of bolt ons....your wasting your money........one word.......headers...... then a custom tune
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Old 10-07-2012, 09:18 PM   #5
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I did a intake, Long tube headers, xpipe, bb exhaust and tune. dyno stock 328, after 391 on the ground. spent about 3000 but well worth it. I am going to put a fast 90 soon and retune.
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Old 10-07-2012, 10:27 PM   #6
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Quote:
Originally Posted by garybg1 View Post
I did a intake, Long tube headers, xpipe, bb exhaust and tune. dyno stock 328, after 391 on the ground. spent about 3000 but well worth it. I am going to put a fast 90 soon and retune.
So you dynoed 10% more than a C5z with just bolt-ons and a tune?
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Old 10-08-2012, 12:24 PM   #7
garybg1
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yes. I had the tune done at FASTLANE in Houston. I am trying to find the Dyno Sheet to post it.

Gary
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Old 10-08-2012, 12:47 PM   #8
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Quote:
Originally Posted by garybg1 View Post
I did a intake, Long tube headers, xpipe, bb exhaust and tune. dyno stock 328, after 391 on the ground. spent about 3000 but well worth it. I am going to put a fast 90 soon and retune.
WOW - - nice numbers....thats about +20 more than the "norm" for bolt ons....
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Old 10-08-2012, 01:09 PM   #9
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WOW - - nice numbers....thats about +20 more than the "norm" for bolt ons....
Which is why I don't buy it. Or the dyno is the most generous in history...
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Old 10-09-2012, 05:02 PM   #10
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Yes I lied, not intentional, I have called to get a copy of dyno but was told it was 373 on the ground hp / 391 torque. Still I will post a copy as soon as I get it.
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Old 10-09-2012, 05:02 PM
 
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