[wang0528]

Well, I just bought my ss last year, so I never want to touch my headers cuz of the warranty, but yesterday a V6 just rev next to me and even louder than my v8. i guess its time to look up the headers LMAO, a few questions hopefully people can help me answer:

1. difference between kooks 1-7/8 and 2 headers or other recommendations?
2. do I need a tune(necessary?) and how much
3. difference between cats no cats

Thank you for your time and help

[Blackmonba6Gen]

Originally Posted by wang0528

Well, I just bought my ss last year, so I never want to touch my headers cuz of the warranty, but yesterday a V6 just rev next to me and even louder than my v8. i guess its time to look up the headers LMAO, a few questions hopefully people can help me answer:

1. difference between kooks 1-7/8 and 2 headers or other recommendations?
2. do I need a tune(necessary?) and how much
3. difference between cats no cats

Thank you for your time and help

This been documented a few times on the sites but I will be nice today

1) Its a matter of inches lol but some say they make more power with 2 some say they lose power. I have 1-7/8 and i haven't had any issues or power loss with it.
2) Yes tune is always necessary with adding headers..you car will start and you can drive it but it will hurt the engine long run. Tune can run anywhere between 500-1500. Depending on if you doing a remote tune or not. My tune on my last car was 1500 which included trans tune, e85 tune, hp tuner credits and dyno tune.
3)cats reduce the smell outside the car and shave the noise down a tad but not much. Catless you can smell your exhaust and usually louder. Some gets cats due to emissions in their state.

[s346k]

Originally Posted by Blackmonba6Gen

This been documented a few times on the sites but I will be nice today

1) Its a matter of inches lol but some say they make more power with 2 some say they lose power. I have 1-7/8 and i haven't had any issues or power loss with it.
2) Yes tune is always necessary with adding headers..you car will start and you can drive it but it will hurt the engine long run. Tune can run anywhere between 500-1500. Depending on if you doing a remote tune or not. My tune on my last car was 1500 which included trans tune, e85 tune, hp tuner credits and dyno tune.
3)cats reduce the smell outside the car and shave the noise down a tad but not much. Catless you can smell your exhaust and usually louder. Some gets cats due to emissions in their state.

what trans tuning was involved with a manual trans car?

to answer the ops questions:

bigger headers make more power

tune is not necessary but headers without cats will result in a CEL. headers with cats will not have a CEL. running either one without a tune will not hurt the engine, but will also offer 0 hp gain.

cats will make the car quieter and smell better on gasoline

[LT1ornothing]

Originally Posted by s346k

what trans tuning was involved with a manual trans car?

to answer the ops questions:

bigger headers make more power

tune is not necessary but headers without cats will result in a CEL. headers with cats will not have a CEL. running either one without a tune will not hurt the engine, but will also offer 0 hp gain.

cats will make the car quieter and smell better on gasoline

Perfectly said.

[Blackmonba6Gen]

Originally Posted by s346k

what trans tuning was involved with a manual trans car?

For the original post, he never clarified which trans he has but My last car was an A8 which needs trans tune which why I stated that and his signature as well. I know manual cars doesn't need a trans tune

to answer the ops questions:

bigger headers make more power

tune is not necessary but headers without cats will result in a CEL. headers with cats will not have a CEL. running either one without a tune will not hurt the engine, but will also offer 0 hp gain.

cats will make the car quieter and smell better on gasoline

Also you mean to tell me running headers without cats or cats will not hinder the engine can't be true otherwise why does the car run lean WOT? Running lean in our cars is a no go.

[s346k]

Originally Posted by Blackmonba6Gen

Also you mean to tell me running headers without cats or cats will not hinder the engine can't be true otherwise why does the car run lean WOT? Running lean in our cars is a no go.

my car did not run lean at all with 2" long tubes and no cats. also my friends car with long tubes and cats (kooks) did not run lean.

[Smokin19]

If it's just the sound you are after install an axle back exhaust and call it a day. No retune will be necessary and you keep your warranty.

[Crushin_LT1]

If you want louder go Corsa Extreme or Botla ATAK (or the NPP versions). Both are loud just different tones, Corsa has the muscle car rumble, Borla is more of the straight loud.

[wang0528]

Originally Posted by Crushin_LT1

If you want louder go Corsa Extreme or Botla ATAK (or the NPP versions). Both are loud just different tones, Corsa has the muscle car rumble, Borla is more of the straight loud.

I have MBRP axle back, I feel its loud enough and enough drone lol, but after battling against a V6 with headers, I feel headers make the sound clear?... i wanna do headers just for the sound and the hp just comes with it, but I don't wanna spend 500-1500 for tune just for headers and void my warranty during the first year

[wang0528]

Originally Posted by Smokin19

If it's just the sound you are after install an axle back exhaust and call it a day. No retune will be necessary and you keep your warranty.

I have MBRP axle back now, but since headers add free hp with better flow and sound, it seems a good choice,,, but I just don't wanna void my warranty

[wang0528]

Originally Posted by s346k

what trans tuning was involved with a manual trans car?

to answer the ops questions:

bigger headers make more power

tune is not necessary but headers without cats will result in a CEL. headers with cats will not have a CEL. running either one without a tune will not hurt the engine, but will also offer 0 hp gain.

cats will make the car quieter and smell better on gasoline

so technically, I can install headers and green cats, which wouldn't hurt the engine or cause CEL without a tune?

[Blackmonba6Gen]

Originally Posted by s346k

my car did not run lean at all with 2" long tubes and no cats. also my friends car with long tubes and cats (kooks) did not run lean.

Interesting....

[Crushin_LT1]

Originally Posted by wang0528

so technically, I can install headers and green cats, which wouldn't hurt the engine or cause CEL without a tune?

I would imagine the dealer, should anything go wrong, would likely blame the headers and cats replacement.

I've no experience with warranty claims, though.

[s346k]

Originally Posted by wang0528

so technically, I can install headers and green cats, which wouldn't hurt the engine or cause CEL without a tune?

yes. a friend of mine has put 20k? miles on his car with cai intake, kooks long tubes, cats and no tune. no cel, no issues. also no hp gain as that car ran door to door with mine when mine was stock.

i still do not understand why anyone would spend the time and money on those parts, only to utilize the factory tune and ultimately end up with a car that still performs at a stock power level. *he bought the car with those mods.