[Z06] LG pro headers
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LG pro headers
I am planning to purchase long tubes soon. Looks like the LG pros are the forum favorites. But are there any issues to be aware of? Fit? Finish? And what are the expected gains on 03 Z with CAI and Corsa Indys will also be dyno tuned. Making 381 RWHP. Any predictions? Thanks for any advice.
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You will need to have your car dyno tuned after you put on the LG Pros. These headers seem to give less power if just bolted on. But if the engine is tuned for these headers, you wind up 15-20 HP more, depending on other mods
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I am planning to purchase long tubes soon. Looks like the LG pros are the forum favorites. But are there any issues to be aware of? Fit? Finish? And what are the expected gains on 03 Z with CAI and Corsa Indys will also be dyno tuned. Making 381 RWHP. Any predictions? Thanks for any advice.
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St. Jude Donor '03-'04-'05-'06-'07-'11
I am planning to purchase long tubes soon. Looks like the LG pros are the forum favorites. But are there any issues to be aware of? Fit? Finish? And what are the expected gains on 03 Z with CAI and Corsa Indys will also be dyno tuned. Making 381 RWHP. Any predictions? Thanks for any advice.
I predict a disappointment for you if you go to another dyno.
381 is on the extreme high end of SAE corrected RWHP numbers for a CAI/catback Z06.
I have LG Pros, no cats, a Halltech TRAP, and the stock Z06 Ti catback, along with an LG tune. My car made 389 SAE corrected rwhp on the LG dyno which is right in the ballpark for a 02-04 Z with said mods.
I can run 12.0's at 117.5 now, so the "proof of concept" was at the drag strip, where before I could get 12.8's.
The variable in that was that my driving has gotten better too.
The fit and finish of the LG's are superb - although a couple of the stock plug boots will slightly contact the header tubes in a couple of places.
I would only have done headers sooner - that is all I would change if I could go back and do it over again.
In short - I believe that perhaps your numbers now are a little high, and you will indeed pick up some torque and high-end power with the addition of the toobs, but I would not expect a 25 rwhp jump from the current 381 number that you got at your last dyno run.
best regards -
mqqn
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From: Bartlett, IL
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Hi got2hav1 -
I predict a disappointment for you if you go to another dyno.
381 is on the extreme high end of SAE corrected RWHP numbers for a CAI/catback Z06.
I have LG Pros, no cats, a Halltech TRAP, and the stock Z06 Ti catback, along with an LG tune. My car made 389 SAE corrected rwhp on the LG dyno which is right in the ballpark for a 02-04 Z with said mods.
I can run 12.0's at 117.5 now, so the "proof of concept" was at the drag strip, where before I could get 12.8's.
The variable in that was that my driving has gotten better too.
The fit and finish of the LG's are superb - although a couple of the stock plug boots will slightly contact the header tubes in a couple of places.
I would only have done headers sooner - that is all I would change if I could go back and do it over again.
In short - I believe that perhaps your numbers now are a little high, and you will indeed pick up some torque and high-end power with the addition of the toobs, but I would not expect a 25 rwhp jump from the current 381 number that you got at your last dyno run.
best regards -
mqqn
I predict a disappointment for you if you go to another dyno.
381 is on the extreme high end of SAE corrected RWHP numbers for a CAI/catback Z06.
I have LG Pros, no cats, a Halltech TRAP, and the stock Z06 Ti catback, along with an LG tune. My car made 389 SAE corrected rwhp on the LG dyno which is right in the ballpark for a 02-04 Z with said mods.
I can run 12.0's at 117.5 now, so the "proof of concept" was at the drag strip, where before I could get 12.8's.
The variable in that was that my driving has gotten better too.
The fit and finish of the LG's are superb - although a couple of the stock plug boots will slightly contact the header tubes in a couple of places.
I would only have done headers sooner - that is all I would change if I could go back and do it over again.
In short - I believe that perhaps your numbers now are a little high, and you will indeed pick up some torque and high-end power with the addition of the toobs, but I would not expect a 25 rwhp jump from the current 381 number that you got at your last dyno run.
best regards -
mqqn
Pretty much have to echo this 100%
I have a set of LG pros (no cats), blackwing and dyno tuning. My car made 389/378
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Hi got2hav1 -
I predict a disappointment for you if you go to another dyno.
381 is on the extreme high end of SAE corrected RWHP numbers for a CAI/catback Z06.
I have LG Pros, no cats, a Halltech TRAP, and the stock Z06 Ti catback, along with an LG tune. My car made 389 SAE corrected rwhp on the LG dyno which is right in the ballpark for a 02-04 Z with said mods.
I can run 12.0's at 117.5 now, so the "proof of concept" was at the drag strip, where before I could get 12.8's.
The variable in that was that my driving has gotten better too.
The fit and finish of the LG's are superb - although a couple of the stock plug boots will slightly contact the header tubes in a couple of places.
I would only have done headers sooner - that is all I would change if I could go back and do it over again.
In short - I believe that perhaps your numbers now are a little high, and you will indeed pick up some torque and high-end power with the addition of the toobs, but I would not expect a 25 rwhp jump from the current 381 number that you got at your last dyno run.
best regards -
mqqn
I predict a disappointment for you if you go to another dyno.
381 is on the extreme high end of SAE corrected RWHP numbers for a CAI/catback Z06.
I have LG Pros, no cats, a Halltech TRAP, and the stock Z06 Ti catback, along with an LG tune. My car made 389 SAE corrected rwhp on the LG dyno which is right in the ballpark for a 02-04 Z with said mods.
I can run 12.0's at 117.5 now, so the "proof of concept" was at the drag strip, where before I could get 12.8's.
The variable in that was that my driving has gotten better too.
The fit and finish of the LG's are superb - although a couple of the stock plug boots will slightly contact the header tubes in a couple of places.
I would only have done headers sooner - that is all I would change if I could go back and do it over again.
In short - I believe that perhaps your numbers now are a little high, and you will indeed pick up some torque and high-end power with the addition of the toobs, but I would not expect a 25 rwhp jump from the current 381 number that you got at your last dyno run.
best regards -
mqqn
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St. Jude Donor '03-'04-'05-'06-'07-'11
I did look at your profile and saw that, but I figured that you did not have the JBA's on your car now.
I have zero experience with the shorty headers, except to have read a lot on this forum and hearing that they are down on torque and the high end breathing that you get with a true long tube.
It is not unreasonable to figure that you will pick up 10 rwhp from the number you are now getting - but I think the overall performance improvement would be better than that number suggests.
In addition, if you ever decide to do a cam or Head/Cam in the future, the longtubes would eek out even more from that type of mod than would the shorty's.
Plus - you could sell the shorty headers on here to recoup a small portion of the outlay for the new headers - you probably already figured for that......
best regards -
mqqn
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Hi got2hav1 -
I did look at your profile and saw that, but I figured that you did not have the JBA's on your car now.
I have zero experience with the shorty headers, except to have read a lot on this forum and hearing that they are down on torque and the high end breathing that you get with a true long tube.
It is not unreasonable to figure that you will pick up 10 rwhp from the number you are now getting - but I think the overall performance improvement would be better than that number suggests.
In addition, if you ever decide to do a cam or Head/Cam in the future, the longtubes would eek out even more from that type of mod than would the shorty's.
Plus - you could sell the shorty headers on here to recoup a small portion of the outlay for the new headers - you probably already figured for that......
best regards -
mqqn
I did look at your profile and saw that, but I figured that you did not have the JBA's on your car now.
I have zero experience with the shorty headers, except to have read a lot on this forum and hearing that they are down on torque and the high end breathing that you get with a true long tube.
It is not unreasonable to figure that you will pick up 10 rwhp from the number you are now getting - but I think the overall performance improvement would be better than that number suggests.
In addition, if you ever decide to do a cam or Head/Cam in the future, the longtubes would eek out even more from that type of mod than would the shorty's.
Plus - you could sell the shorty headers on here to recoup a small portion of the outlay for the new headers - you probably already figured for that......
best regards -
mqqn
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St. Jude Donor '03-'04-'05-'06-'07-'11
Hi got2hav1 -
Good deal - I don't think you will be disappointed.
Here is a vid of mine at the track - you can hear how the LG's sound taking off from the line - I get a lot of compliments on the sound, but I did it for the power.
http://www.iammoon.com/vids/cordova_..._oct202007.MPG
best regards -
mqqn
Good deal - I don't think you will be disappointed.
Here is a vid of mine at the track - you can hear how the LG's sound taking off from the line - I get a lot of compliments on the sound, but I did it for the power.
http://www.iammoon.com/vids/cordova_..._oct202007.MPG
best regards -
mqqn
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The shorty headers explain a few things. I have an 02 and just did a bunch of mods in one swoop... Callaway Honker, LG Pros with cats, x pipe and bullets. The pull on a conservative dyno was 372 rwhp pre-tune (+30). After a very conservative tune it was bumped another 8 rhwp to 380 rwhp. I know the dyno was more conservative than another in town... but always felt the tune left a little on table.
I have also heard the early 02 Zs like mine were about 5 hp less than the 03-04s (but at least they dont lose oil!). Taking all that into account, I dont really know what the difference will be between jsut long tube and shorties but felt like blogging. I would bet 10hp.
I will say this... the car really came alive (+35 torque) when I did the combined mods. I am 42 years old and feel 16 when it is wide open throttle. Cant beat the sound and feel... it sounds "wicked".
I say do it...And, afterall... its only money (we are talking about cars right!).
I have also heard the early 02 Zs like mine were about 5 hp less than the 03-04s (but at least they dont lose oil!). Taking all that into account, I dont really know what the difference will be between jsut long tube and shorties but felt like blogging. I would bet 10hp.
I will say this... the car really came alive (+35 torque) when I did the combined mods. I am 42 years old and feel 16 when it is wide open throttle. Cant beat the sound and feel... it sounds "wicked".
I say do it...And, afterall... its only money (we are talking about cars right!).
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St. Jude Donor '03-'04-'05-'06-'07-'11
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Same results that alot on here have seen.
2003 EB Z06
Halltech
LG longtubes & X (no cats)
No tune (car was ran on a Dyno after install of headers to make sure car was not running lean, but not retuned.)
383 HP 370 TQ
2003 EB Z06
Halltech
LG longtubes & X (no cats)
No tune (car was ran on a Dyno after install of headers to make sure car was not running lean, but not retuned.)
383 HP 370 TQ
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12
It would be safe to say with a tune you would probably pick up 10rwhp/10rwtq
