Header Question
Thread Starter
Racer
Joined: Sep 2008
Posts: 368
Likes: 1
From: Winterville NC
Header Question
C6-06 LS2: I have the Corsa Sports exhaust. I may eventually want to upgrade. So this is what is on my mind. I'm not installing a cam, I want to add 1-3/4 LT headers tied into my existing 2.5 pipe exhaust. How much HP will I gain. Will there be much difference from my 2.5" vs. the 3". I just spent $$$ on the corsa sports. tks TIM$VETT
Le Mans Master
Joined: Jan 2009
Posts: 6,113
Likes: 8
From: Pottsboro; Sometimes Dallas Texas
St. Jude Donor '12
C6-06 LS2: I have the Corsa Sports exhaust. I may eventually want to upgrade. So this is what is on my mind. I'm not installing a cam, I want to add 1-3/4 LT headers tied into my existing 2.5 pipe exhaust. How much HP will I gain. Will there be much difference from my 2.5" vs. the 3". I just spent $$$ on the corsa sports. tks TIM$VETT
Racer
Joined: Jul 2005
Posts: 420
Likes: 14
From: California
C6-06 LS2: I have the Corsa Sports exhaust. I may eventually want to upgrade. So this is what is on my mind. I'm not installing a cam, I want to add 1-3/4 LT headers tied into my existing 2.5 pipe exhaust. How much HP will I gain. Will there be much difference from my 2.5" vs. the 3". I just spent $$$ on the corsa sports. tks TIM$VETT
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
C6-06 LS2: I have the Corsa Sports exhaust. I may eventually want to upgrade. So this is what is on my mind. I'm not installing a cam, I want to add 1-3/4 LT headers tied into my existing 2.5 pipe exhaust. How much HP will I gain. Will there be much difference from my 2.5" vs. the 3". I just spent $$$ on the corsa sports. tks TIM$VETT
The difference between 2.5" and 3.0" exhausts is very little IMHO. I recall an old thread that showed the difference between an aftermarket exhaust and no exhaust (open pipes) was less than 5 rwhp. The Z06 mufflers neck down to 2.5 at the inlet.
San
Pro
Joined: Sep 2005
Posts: 695
Likes: 19
Definitely no need to swap out for the 3". LT headers fatten the tq curve more than outright hp. Peak hp may be 25 gain or so, but I gained almost 4 mph at the drag strip, and it was never easier to spin those runcraps. I swapped tunes back and forth between stock and a mail order at the track one night and didn't see much difference. However, the removal of tq management is awesome and very noticable, and it was nice to turn off the CEL that popped up about a hundred miles after installing the headers. Also got rid of skip shift without the resistor mod.
The headers were definitely worth it, and I would recommend it to anyone considering them.
The headers were definitely worth it, and I would recommend it to anyone considering them.
Premium Supporting Vendor
Joined: Nov 2005
Posts: 1,779
Likes: 129
From: Amityville ny 631-608-1986
Tim, Our 1-3/4" header system will bolt up to your Corsa system right at the rear axle. The system will start out at 3" through the X-pipe but will reduce to 2-1/2" after the cats. Though we make a 3" mid section that reduces to 2-1/2" by the rear axle, I believe it's more than you need. If you'd like to get into in detail simply PM me a phone number and a good time to call and I'll reach with all the info about our systems. If it's easier you can reach me at 631-608-1986. Thanks.
Nick
Nick
Former Vendor
Joined: Aug 2005
Posts: 16,897
Likes: 412
From: Lewisville TX
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
All of our header systems are designed to work with the OEM or aftermarket replacement systems. Street Series or Super Pro's. No modification needed.
Like most have said, the cat backs do not gain much in the way of HP as from what I have seen in the past. Most of the gain is going to come from the headers, cold air, tune....
Now I did do a before and after on my 2006 LS2 car. I took off the stock mufflers and went to the Z06 Borla units after our headers were already on the car. I gained 8rwhp 12 rwtq....but not only going 2.5 to 3" but also OEM to aftermarket so not a huge gain, but no loss from the bigger pipes either.
Like most have said, the cat backs do not gain much in the way of HP as from what I have seen in the past. Most of the gain is going to come from the headers, cold air, tune....
Now I did do a before and after on my 2006 LS2 car. I took off the stock mufflers and went to the Z06 Borla units after our headers were already on the car. I gained 8rwhp 12 rwtq....but not only going 2.5 to 3" but also OEM to aftermarket so not a huge gain, but no loss from the bigger pipes either.
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