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

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Old 02-01-2011, 06:30 AM   #1
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How to get 40-50 more horsepoweR??



I am now in California and have a l99 with 22s on. I have had my resonator deleted as well as had a k&n intake installed. I wanna get about 50 more horsepower, so how would I go about getting this done? What do you guys think these small mods have done for my SS with the 22s on?
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Old 02-01-2011, 06:45 AM   #2
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Longtube headers w/ High flow Cats + Tune

You'll achieve your goal easy maybe even a little more.

Hope that helps.
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Old 02-01-2011, 07:14 AM   #3
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Any brands that I should opt for? How much do you think I will end up spending for the stuff and the installation?
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Old 02-01-2011, 07:15 AM   #4
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Longtube headers w/ High flow Cats + Tune

You'll achieve your goal easy maybe even a little more.

Hope that helps.

You are dead on, but they are in CA and they very strict on emissions. They may need to speak with some local performance shops in the CA area to see what can be done legally there.
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Old 02-01-2011, 07:18 AM   #5
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You are dead on, but they are in CA and they very strict on emissions. They may need to speak with some local performance shops in the CA area to see what can be done legally there.
how would I go about this situation? what could happen if I have these things installed?
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Old 02-01-2011, 07:20 AM   #6
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If you now live in CA they may not pass your vehicle inspection. They are very strict in CA so I would get with a speed shop there and ask them what can be done legally to get you up to that power band and will also pass inspection.
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Old 02-01-2011, 08:23 AM   #7
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I'd sell the 22's. Find a catback that has no drone with the L99 AFM, and call it good.

Th 22's are going to kill any small hp bumps from bolts ons. The inspection thing may put a wrench in LT's and tuning.
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Old 02-01-2011, 08:40 AM   #8
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just take off the headers for inspection every 2 years ??? , yes its going to cost money. but you want 50 HP thats whats its going to take.
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Old 02-01-2011, 09:39 AM   #9
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I have headers and I live in Cali. Best thing is to ask around at small hole in the wall smog shops. Trust me, you will find someone willing to pass you for 50 bucks. Been doing it for years on my vehicles. I've even got away with not saying anything and still passing smog. Most smog techs are young kids that have no idea what is supposed to be there and what isn't. I say go for headers. Don't let the government decide what to put on your car.
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Old 02-01-2011, 09:53 AM   #10
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Legally, you can't put on long tube headers or even touch the cats here in California unless it's CARB certified...but that's only if you want to follow the rules...
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Old 02-01-2011, 10:12 AM   #11
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I'd sell the 22's. Find a catback that has no drone with the L99 AFM, and call it good.

Th 22's are going to kill any small hp bumps from bolts ons. The inspection thing may put a wrench in LT's and tuning.

Depending on the weight of the wheels, they are probably worth about -30hp. I know the factory 21'' wheels will slow you down by about .2 or so in the 1/4 mile (maybe more).
So he'll probably need intake, headers, and a tune just to keep up with a well tuned L99 (running the factory 20'').

If he's serious about performance, he'll definately need another set of wheels for the track/drag strip. And if he wants the best performance possible on the street, he should think about getting some smaller/lighter wheels.
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Old 02-01-2011, 10:15 AM   #12
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American Racing Headers

hv92
We carry American Racing, Kooks, and Stainless Works headers. Anyone of these header systems will get you to your goal of 50rwhp.

Give me a call if you have any questions. 770-919-7774





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Old 02-01-2011, 10:57 AM   #13
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Trust me, you will find someone willing to pass you for 50 bucks.
There are lots of Smog shops in my hometown (Lodi,CA) that would pass cars without cats or mufflers, just have to know where to go.
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Old 02-01-2011, 11:24 AM   #14
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You can't legally put long tubes on in Cali.
You could do an intake and cam, have the heads touched up, a performance tune, have your intake ported, shorty's although I really dont know how much power they will add over the stock manifolds.
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Old 02-01-2011, 01:01 PM   #15
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Depending on the weight of the wheels, they are probably worth about -30hp. I know the factory 21'' wheels will slow you down by about .2 or so in the 1/4 mile (maybe more).
So he'll probably need intake, headers, and a tune just to keep up with a well tuned L99 (running the factory 20'').

If he's serious about performance, he'll definately need another set of wheels for the track/drag strip. And if he wants the best performance possible on the street, he should think about getting some smaller/lighter wheels.
They are savini sm-3, which idk the weight of. I have googled it as well. Does anybody know?
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Old 02-01-2011, 01:42 PM   #16
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They are savini sm-3, which idk the weight of. I have googled it as well. Does anybody know?
Wheel weight is very important because it has a mutiplied effect. 20 extra pounds of rotating mass is equal to a lot more than that in static weight.
But even light weight 22'' wheels have a negative effect on peformance (but no where near as bad as heavier 22'' wheels). One reason is due to the wheel's average weight balance being shifted out further from the center. Another is due to your tires having less sidewall (affect traction off the line).

To give you an idea my 20'' Nurburgings weigh 24 lbs (front) and 25 lbs (rear). The stock wheels weigh 32 lbs.

I know several guys that had 22'' wheels and after 1 trip to the track, they got new wheels. Some completely changed out their wheels, and others just use them for track days.

You could get some light weight wheels and put them on when you go to the track (if you like to race). That's what a lot of guys do. Then have your 22'' wheels for street cruising.
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Old 02-01-2011, 01:57 PM   #17
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Besides moving the cats back or fwd whichever it does why are Headers now allowed in Cali ?

Its just a larger manifold that flows better. Which imo gives it better gas mileage if you drive it normal
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Old 02-01-2011, 02:16 PM   #18
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You can't legally put long tubes on in Cali.
You could do an intake and cam, have the heads touched up, a performance tune, have your intake ported, shorty's although I really dont know how much power they will add over the stock manifolds.
maybe i am mistaking, but i thought most cams people do are not emission friendly ?
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Old 02-01-2011, 02:24 PM   #19
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Besides moving the cats back or fwd whichever it does why are Headers now allowed in Cali ?

Its just a larger manifold that flows better. Which imo gives it better gas mileage if you drive it normal
C.A.R.B. is the devil. We tried to get some of their power taken away after it was proven that they falsified Air Resource test numbers, but there are too many nut jobs here in Cali that wouldn't go for it. They mandate that everythng be kept O.E.M. unless the company pay's their extorsion fee to get a C.A.R.B. number. As far as cat's go, the only "legal" way to replace a cat is with an O.E.M. cat, and that is only if the original cat has failed.

As for LT's in CA. It is a huge fine if you're cought with them. If you keep a toned down set of mufflers on her, you should be ok, until you have to get it smogged. The state is changing the way smog checks are going to be done starting in 2013. They will be using the plug to check certain "failures" in the computer. IF you have the right shop do your tune, these can get fixed and if your smog shop is visually challenged, you can get by with LT's.

Have you changed your registration to CA yet? If not, you will have to get it smogged in order to do that. Make that happen before you do any mods. Even CAI's can cause you to fail smog here because they don't retain the carbon filter.

LT's, CAI and a tune bumped my LS3 to 430rwhp/425rwtq from 378/378 stock.

Worst case senario is your in the bay area (SF) and you run into everyone's favorite cop. He loves popping hoods and writing tickets. Best case, you're anywhere else.

What area of California are you in? Maybe one of us can help you find a shop to help you out.
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Old 02-01-2011, 02:51 PM   #20
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If you don't want to change your exhaust you can take your car to a tuner and have them remove most of the torque management out of the trans. You won't change your HP but your car will gain a LOT of torque in the lower RPM's and you will really feel it in the seat of your pants!!!
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Old 02-02-2011, 06:57 PM   #21
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im sorry im not in california I just never knew why longtubes were not allowed in california.

I understand the whole Cat thing and etc and I knew about C.A.R.B however I didnt udnerstand why a larger free flowing type of a manifold such as Headers was not allow.

Thanks for explaining.
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Old 02-04-2011, 05:13 AM   #22
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i am definitely keeping the 22s on. they complement my car perfectly. but I definitely feel as if i need a little bit more power for the car. Should I just wait another year and supercharge it?
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