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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 05-20-2013, 12:52 AM   #1
CamaroDIYking
 
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Header and cats question

I'm looking to buy a set of headers and possibly cats. Where I live, I am not required to pass emissions or noise tests. What would you guys recommend? What size headers? Should I even buy cats? What would hi-flow cats do for me anyways?

I have a catback Dynomax exhaust. I installed them with out the mufflers though. Any recommendations?
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Old 05-20-2013, 01:25 AM   #2
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I keep wondering why people spend money on a cat back and then eliminate the mufflers?
! 7/8" long tubes are the norm. As for hi flo cats..........depends on how raspy you want your exhaust. The cats will mellow the rasp. There are plenty of good quality headers out there, just read some threads and visit our vendors.
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Old 05-20-2013, 01:31 AM   #3
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Well I bought the car with the catback on it but took the mufflers off cause I wanted it a little deeper and louder. So if I don't want it to be raspy, I should add hi-flow cats? Or just regular cats?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-20-2013, 01:33 AM   #4
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i have american racing 7/8 headers with highflow cats and full 3 inch exhaust. no mufflers or resonators.

this is at WOT

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Old 05-20-2013, 01:35 AM   #5
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That supposed to be a video?
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2010 2SS/RS- every option possible in 2010

Lighting- LED footwell, grille, trunk, and engine lights done via DIY. LED dome, DRL, and tag lights.
Paint- Painted engine cover, steering wheel bezel, speedometer bezel, front bowtie, tail light bezels, wheel center caps.
Exterior lights- tinted tail lights and sidemarker lights.
Wheels- powdercoated stock RS 20' wheels black
Exhaust- Cat-back Dynomax Bullet Exhaust system with bullet muffler delete.
Misc- rear blackout kit from Big Worm Graphix, black side Camaro lettering from Emblem Pros, and rear Camaro lettering from Emblem Pros.
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Old 05-20-2013, 01:45 AM   #6
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If ur looking for a set of headers and cats i would recommend Kooks or American Racing Headers (ARH). I personaly just installed a set of Kooks long tube headers along with their highflowcats and i love the fit, finish and quality of them. If ur planning to keep ur car stock and just add some headers and exhaust the 1 3/4 headers will work. If ur planning to do more mods in the future then 1 7/8 is the way to go (thats what i have) and if ur planning to go with high horsepower #s like a big supercharger than 2 inch will be best. U can't go wrong with a 1 7/8 inch set of headers. That is what i recommend. If u get a set of headers i recommend u get them coated also so u hood keep the under the hood temps a bit lower as they help to do that plus it also gives ur car that extra eye candy under the hood. PM me if u want me to tell u where u can get a set of headers with cats for an unbelievable price!!!! u can get a set of Kooks headers coated but i think ARH doesnt coat theirs. U can always get them coated tho! I would recommend cats unless ur car is supecharged then i would say no. The Kooks high flow cats are really high flow and.u can even see light through them. They help ur car not smell like an old muscle car. The cats flow very well that u probabpy wont gain much hp if u dont run them. And just warning u, once u do headers ur car will be LOUD !! It will sound bad azz! And in order to get the full benefit.of them.u will have to tune ur car. I love mine.!! Pm me and i can hook u up.with a set for a great price. Do it once and do it right!!!
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Old 05-20-2013, 01:45 AM   #7
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if you have no smog or sound restrictions and no wife to bitch about the smell of fuel dont bother paying extra for cats...just get the connections or offroad pipes.

headers and no mufflers is gonna be loud. might look at putting your mufflers back on. goodluck hope i helped a bit.
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Old 05-20-2013, 01:49 AM   #8
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Quote:
Originally Posted by CamaroDIYking View Post
That supposed to be a video?
yeah click on it
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Old 05-20-2013, 07:56 AM   #9
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I went with JBA & JBA HF cats. Easy install and sounds great with my NPP cat-back. If I hadn't bought JBA I'd have bought Kooks.
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Old 05-20-2013, 05:01 PM   #10
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Quote:
Originally Posted by CamaroDIYking View Post
Well I bought the car with the catback on it but took the mufflers off cause I wanted it a little deeper and louder. So if I don't want it to be raspy, I should add hi-flow cats? Or just regular cats?
With headers, always high flow cats....not stock cats. Im only speaking from my experience. '04 GTO: full stainless works 3" w/turbo mufflers and hi flow cats. 1 3/4" long tubes. Sounded nice and stock at idle. Nice low tone when opened up. '06 GTO stainless works 1 3/4" long tubes and stock cat back, no hi flow cats. Had a good sound at idle and low rpm. But when you got into it, it was raspy.
I find the cats mellow the tone in the higher rpm. An x-pipe will also mellow it some.
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Old 05-20-2013, 05:06 PM   #11
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1 7/8 headers. Cat delete. Put your mufflers back on. Kooks.
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Old 05-20-2013, 08:49 PM   #12
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My vote, kooks 1 7/8th headers, kooks high flow cats.

Go to www.marylandspeed.com... awesome online shop!

Unless your in the ATL area. Call MTI racing man. They will hook you up!
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Old 05-20-2013, 09:21 PM   #13
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Quote:
Originally Posted by Mchlgrrsn View Post
1 7/8 headers. Cat delete. Put your mufflers back on. Kooks.
Do this. With the mufflers... you'll question whether or not it's too loud. Then you'll ultimately decide your car sounds bad f*cking a$$, and be very happy with your decision-making ability. My muffler deleted catback is still up on the shelf at the shop where it belongs...
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Old 05-20-2013, 09:39 PM   #14
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kooks = muy bueno

i heart my headers....
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Old 05-20-2013, 09:42 PM   #15
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Quote:
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My vote, kooks 1 7/8th headers, kooks high flow cats.

Go to www.marylandspeed.com... awesome online shop!

Unless your in the ATL area. Call MTI racing man. They will hook you up!
great vendor, also where I purchased mine. Kooks 2" headers with high flow cats and Corsa 3" exhaust.
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Old 05-20-2013, 10:00 PM   #16
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1 7/8" Kooks Coated LT's with HFC's!
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Old 05-21-2013, 12:26 PM   #17
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I highly recommend high flow cats. Most exhaust systems don't sound very good catless.

Please feel free to call, PM or email me anytime with questions or pricing. We have a few promo's going on right now.

Best regards,

Tyler
888-308-6007
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Old 05-21-2013, 02:12 PM   #18
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Quote:
Originally Posted by CamaroDIYking View Post
I'm looking to buy a set of headers and possibly cats. Where I live, I am not required to pass emissions or noise tests. What would you guys recommend? What size headers? Should I even buy cats? What would hi-flow cats do for me anyways?

I have a catback Dynomax exhaust. I installed them with out the mufflers though. Any recommendations?
BAWLZ SS is pretty much on-point. There are many good options; both made in the U.S.A. and not; you just have to decide if that's important. For anyone considering headers, I highly recommend getting them FIRST; then figure out what exhaust you would like. Because....now back to the OP.....headers will significantly amplify whatever exhaust sound you have now. So, depending on if you like the sound after your header install you may want to install those mufflers. Many people end up selling the exhaust system they have after they install headers because it gets too loud (check out the member classifieds). Some also say it changes the tone but this is all very subjective to the listener.

As for size, I recommend 1-7/8 because there is not much price difference (if any) over the 1-3/4 and then you are covered for most all future performance mods. I am a fan of getting them coated. Jet Hot is the most widely known but they are by far the most expensive. There are other coating vendors out there with more reasonable pricing.

I also recommend hi flow cats with your headers because I don't think you will like the smell without them. Also, back to the sound, no cats will make the exhaust louder than without them.
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Old 05-21-2013, 03:24 PM   #19
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Originally Posted by RJT-SS View Post
BAWLZ SS is pretty much on-point. There are many good options; both made in the U.S.A. and not; you just have to decide if that's important. For anyone considering headers, I highly recommend getting them FIRST; then figure out what exhaust you would like. Because....now back to the OP.....headers will significantly amplify whatever exhaust sound you have now. So, depending on if you like the sound after your header install you may want to install those mufflers. Many people end up selling the exhaust system they have after they install headers because it gets too loud (check out the member classifieds). Some also say it changes the tone but this is all very subjective to the listener.

As for size, I recommend 1-7/8 because there is not much price difference (if any) over the 1-3/4 and then you are covered for most all future performance mods. I am a fan of getting them coated. Jet Hot is the most widely known but they are by far the most expensive. There are other coating vendors out there with more reasonable pricing.

I also recommend hi flow cats with your headers because I don't think you will like the smell without them. Also, back to the sound, no cats will make the exhaust louder than without them.
I agree it's smarter to do the headers first... especially since basically everyone says they sound great with the stock system. It's really easy to go louder. As far as the smell goes... I love the smell of no cats. It smells exactly like a boat.
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Old 05-21-2013, 03:38 PM   #20
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well.....with a name like thahemp that makes perfect sense.

.....all in good fun.
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Old 05-21-2013, 03:49 PM   #21
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well.....with a name like thahemp that makes perfect sense.

.....all in good fun.
Hey whatever covers it up!
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Old 05-21-2013, 04:20 PM   #22
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Good one Now......
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