Back to Back Kooks vs LG Pro Long tubes test results

[L G Motorsports]

LG Pro Long Tubes up 10 rwhp UP 16 rwtq

These were 1 3/4" kooks vs 1 3/4" LG Pro Long Tubes with cats.

Last Friday the test was done at LAPD in California. The car was a cam and head car that did 461rwhp 416rwtq after extensive tuning before the change over.
The LG headers were installed and after tuning for the different characteristics of the headers, the results were 471rwhp 432 rwtq and a bonus extra torque increase at 2800 rpms of 23 ft lbs with the LG's.

We were waiting for someone to step up to the plate and want to try our LG PRo Long Tubes over the Kooks and it has now been done.

Both systems had Cats, and both had 3" X pipes and rear pipes. The results speak for themselves.

We want to thank Sean at LAPD for facilitating this test.

LG Pro Long Tubes, "the most powerful C5 header on the Planet"!

[freefall]

Those were some impressive results. I have a few clarifying questions for you.

- were the same cats used?
- were the ONLY changes the headers and tune?
- can you post the dyno graphs including A/F curves for each?

We have been hearing this debated back and forth for a while, so its nice someone stepped up to the plate and did the comparo. Thanks.

[Nick@KOOKS]

What a joke! Quote: After tuning for the different characteristics of the headers. End Quote: This is pure comedy. Guess sales have been real bad lately. LOL Nick "Kook's Headers"

[xsiveone]

Oh boy.. Had a feeling that this was going to happen.

X

[Golffox]

This thread will DEFINITELY be on my e-mail notification list. This should be a good one to watch.

I have my KOOKs', never did any performance comparison's to any other brand, just happy with:

• The RWHP #'s
• The sound
• The look
• The price
• The service

I may be wrong, or I may be right, either way I'm satisfied.

[niphilli]

These areboth great quality headers, but to be honest I find this hard to believe I barely got a 23 RWHP delta switching from Manifolds to LTs (internally stock). I would like to see a before and after dyno chart with a before and after ATAP log showing Timing and A/F (02s). If this is true you guys have an incredible product, because I have see first hand some GREAT results from Kook's products.

[L G Motorsports]

We can't keep our headers in stock. we ship them as fast as Borla makes them.

Why is this so hard to believe? The test was done in California. I had nothing to do with the testing.

The engine package was tuned to the max with the kooks and they were satisfied but they, like everyone else, wanted to know for sure if there was any hp left on the table.

They changed the headers from kooks to LG Pro Long Tube headers and initially found 6 rwhp and torque. They then worked on the tune and found the added 4 hp.

Please don't try to tell everyone that a different set of headers with different tube lengths and other parts will need the same tune as the others.

The cats on the LG Pro Long Tube headers are full metal Matrix cats which are known to product more hp than the cheaper ceramic cats, so that explains some of the difference. But the rest of the difference is from the totally different design of the two headers.

I am sure that regardless of the facts, their will be those who will not accept reality.

This was done by an independent 3rd party who's only goal was to find the most hp with their package. They had no interest in gettting into a war about headers, they just wanted the most hp and torque.

Thanks

Lou gigliotti LGM

[MikesZ06]

The tuning and dyno variables on a test like this are almost too many to count, not to mention other testing variables such as cats (hi-flo vs oem, etc).

I'm content to say that LG and Kook's, along with a couple of others, make extremely good headers for our Vette's!

Mike

[freefall]

The reason for my questions was to clarify what gains should be attributed to the headers alone. I do not doubt the results seen, just want to remove as many large variables as possible since a considerable gain was seen. Correct me if I'm wrong, but the metal matrix cats can be used with either header, right? Wouldn't the high end power difference primarily be due to the different cats, and the low end torque to the headers?

I think people are looking for a good comparison to finally settle this debate (like that's really going to happen!). The more information presented - all differences between the setups and the curves - the less it would seem like marketing that is typically presented.

And I agree with Mike - both companies put out a quality product.

[L G Motorsports]

A different cat would alter the numbers, but not the power curve. Since they increased the torque at 2700 rpms by 23 ft lbs with the LG Pro Long tubes, then it is more than just the cat difference. They were both the high flow cats from each brand header.

Keep in mind that the top 4 Corvettes at the Sebring World Challenge race had LG Pro Long Tube headers on, and they have the budget to run any header they want.

It seems that a test is only valid if it is in line with the beliefs of those reading the results. If Brand X is better than Brand Y, but a person has Brand Y, then they try to poke holes in the test.

These are the results. The headers were changed to try to get the most hp out of a test engine that had another manufacturers part installed. The point of the change was to Maximize the hp not help either header manufacturer.

Thanks guys,

Lou Gigliotti LGM

[Nick@KOOKS]

The Kook's system used wasn't a 3" system. It was our 3" x 2-1/2" system that we originally sold to the customer for his bone stock C5. 461rwhp from our our most basic system we think is pretty impressive. Imagine what kind of power it would have made with our 1-7/8 headers and our larger 3" exhaust system. Nick "Kook's Headers"

[G-Z06]

Give me a set of both... And I will let everyone know... which has more power. lol

I will give an honest answer....


honestly both seem good.

Congrats on both parties.

G

[PaulS]

I have a test mule.....
2002 Z06 with 19k miles...
LG G5X-3 cam, Comp 921 springs, underdrive pulley
Dynoed at 404rwhp using completely stock exhaust...

Each of you send a set of headers to MC Racing in Kansas City and I'll work with them to document the results. MikesZ06 is here to verify (You have to believe a moderator right?).

Now, if I can just get the winner to give the headers away for all the hard work and documentation....

[phantasms]

I'm on LI and I have a set of LG's. If you guys at Kooks want to dyno my car, throw yours on and dyno again by all means let me know. I only got 17hp out of the LG's. I was really more impressed with the sound than the performance gain. I did gain 24tq but not like 40 under the curve as I was hearing about. I do have LG's and am happy but I'm not convinced as to which one may be better. So again if you want to take my car and get it done and post the results just let me know. My headers don't even have cats so if yours could gain more power with cats (which i think could happen) here's your opportunity to prove it. BTW, I had them installed at Vette Doctors.

Gene

[niphilli]

I am definately not knocking either product, I think they are both great.

Lou, is it possible that your headers are more efficient in getting exhaust out of the combustion chaimber allowing for more timing without detonation?