has anyone done the callaway headers i was thinkin of doing them i have corsa sports and i dont like the sound of lg or koos and all the drama that comes with it plus the callaway look factory not long tube need advice

 

Headers arent about sound junior ... its about airflow...

Why even get headers then if you dont want longtube? Im sure someone could take yours off and jet coat them lol

 

To explain the rationale behind short tube headers:
On a stock LS2, the Callaway headers are worth 15 - 17 bhp. The sound of the exhaust is changed (improved, IMHO), as well.
Long tube headers will produce more power, however, to install them the catalytic converters and oxygen sensors must be relocated. Relocating the converters, or installing non-OEM, high flow converters, is considered "Tampering" by federal EPA regulations. Tampering is illegal and the manufacturer and distributors of the tampering products can be fined. As an example, during the initial manufacturing of the Callaway Twin Turbo Corvette, in the mid-'80s, Callaway was fined (heavily) for installing perfectly good, higher-flow, German OEM-built converters in these cars. These converters contained the proper loading to reduce emissions to the required level, but they simply did not have the part numbers certified for the Corvette. Callaway did not know that we were breaking the law, but that was no excuse.
Obviously, we realize that long tube headers are installed and converters are relocated every day. However, Callaway has decided to avoid any possible future legal issues and develop products and systems that comply with all emissions regulations.
Also, relocating the oxygen sensors can result in triggering DTC's as they are moved farther downstream in a relatively cooler location. So we chose to avoid these issues as well.

 

Before you reconfigured your website, I calculated the headers to be worth only about 8 HP. If your now saying 15 HP, that means the $1,440 High Volume Polymer Intake Manifold is only worth 13 HP.

 

These guys are say that tubes no longer than the exhaust manifolds, because there individual tubes to the cats, make 17hp over stock. Shorties never have and never will ever make any real hp. Save your money, either buy LT or nothing. Why relpace one manifold with another? There basicly the same, and they know it!!. You know what they say"build it, charge enough for it, and people will buy it". No matter if it works or not. My .02 cents

 

Thanks for posting MCV. LPE says the same thing when explaining why they don't install long tube headers. Bit ridiculous to me!

 

To all readers of this thread,
Please accept my apologies. I made a mistake in projecting an increase of 15 to 17 hp with our headers. As an engineer, working in the performance aftermarket since 1977, I couldn't be more embarrassed. I suppose I should have read what I was typing. Our test results indicate an actual increase of 8 to 10 bhp.

To come up with the estimate in my original statement, I compiled data from a lengthy dyno test session that included several component changes. These components included various air intake systems, camshafts, intake manifolds, different header configurations, cylinder heads, etc. There were 31 combinations of components, with periodic re-baselining to ensure the engine was still healthy. So, when I calculated the 15 to 17 hp increase, I selected the wrong dyno test number for the 'with headers' test.

Once TommyV and others questioned the 15 to 17 hp, it made me think - hey wait a minute - they have a point!

Please believe that the original statement was not an attempt to mislead or misrepresent the product. Proper engineering practices and accuracy in advertising are core principles of Callaway's business philosophy. Again, my apologies for this error.

Mike Vendetto
Commercial Manager
Callaway Cars, Inc.

 

 

I want to add the increased power, engine performance of my C6 without appreciably increase the noise. I have a convertible and while I like driving fast, the sound doesn't really do much for me. I am OK with some, mild increase in volume but that's not my objective. I think of it as making a 'stealthy' performance increase.

Can someone help me better understand whether it is the Headers or deeper into the Exhaust system (Catalytic Converter(s), Mufflers, etc) that results in the greater amount of increased noise (Music to some ears!) or change to the tone/ressonance of the engine?

Can I add Headers (LG Long Tubes, etc) and Intake (Haltech Stinger, etc) but not significantly increase sound volume? What's the right formula with respect to Cats' and Mufflers?

Just FYI - Yes, When I do make these changes, I will also do the tune (LS2 Edit or from Chip from Header Vendor, etc)

TIA

 

Most of the noise comes from the actual mufflers. Headers you will have a deeper note. Also a little bit of ping from the tubes.

Video with LG's cats and stock mufflers.

http://www.pnwzr1.net/Jeff/C6/MVI_5228.AVI

 

Thanks JeffVette;
Sounds Good, not obnoxious.
Is it much different at Highway speeds?
Can you give me some sort of comparisson to pre-Headers?
something like 10% louder, 25%, 50%, 80%...etc?

TIA