omcar

iTrader: (10)

Yes, i know they are supposed to be useless on a 2001 f-body but I have heard of cars picking up 1-2 tenths with these with a tune. Can anyone confirm that they are effective? This is for my Cali friends. Thanks

cookba

iTrader: (10)

i highly doubt it. tell your friend to bite the bullet and get LT's

TheSecretFormula

iTrader: (2)

If they are picking up 1-2 tenths it's from the tune. The headers aren't doing jack, especially on an 01. The 01-02 manifolds are as close to a shorty header as you can get.

dnm12

iTrader: (13)

everyone says that shortys are no good, but I am rocking them here in cali, I am sure I would make more power with LT's but I bet my shortys are better then stock manifolds (not for the money though )

Starz T/A 17

iTrader: (6)

I had them on my old car and YES you can feel a difference, but its not as big as a difference as LT's, Yea LT's are a bigger bang for your bux, but if you wanna stay emission friends there the way to go, or spend the money elsewhere

Formy

I have to agree about the tuning. I went with the PaceSetter shorties myself and I want to go with long tubes but Cali says NO!!! . My tuner/mechanic told me I am leaving about 20 to 30 horses on the table because I don't have long tubes. I just do not want to go with the hassle of changing stuff out when it is time to smog.

Oh yeah I just did my smog. Passed with flying colors.

TheSecretFormula

iTrader: (2)

Yes shorties will make about 10rwhp over 98' manifolds. He is talking an 01. The 01-02 manifolds flow as well as shorties.

SS4Luck

iTrader: (10)

i passed smog with my lts... lol cost me an extra $50 but as long as you have cats there should be no problem

Rob98LS1

iTrader: (5)

Do they change the tone of the exhaust i wonder.?

Black99TransAm

iTrader: (16)

i got jba headers... i would of went with long tubes but i got the headers and y pipe from a shop that had them on one of their cars for 75 bucks... couldnt really pass it up. and they look better then the manifolds

Formy

You should have seen the tech. He had a flashlight and was looking for stuff that did not look right. He broke out with the manual. He got underneath to check for cats. He was really cool but was checking everything.

I told him I had shorties and that they are C.A.R.B. approved. He told that my car "sounded funny"... "Kind of lumpy..."

I told him it was "bone stock"

ChocoTaco369

but they don't scavenge well. nearly ALL the horsepower picked up with headers is through scavenging, NOT FLOW. people confuse these. the reason why longtubes gain more horsepower over shorties has NOTHING to do with flow. they'll both flow the same. longtubes scavenge better. here is the deal with headers:

since longtubes are longer, they scavenge more effectively sooner, meaning you start gaining throughout the whole rpm range. shorties can still scavenge, but they require a very high rpm to scavenge as well as longtubes. if we could rev our engines to 12,000 rpms, a shorty header would be just as effective as longtubes or darn close. however, since we redline at 6-7k, shorties are ineffective until the very high rpms.

in short, you WILL gain power, even over '01-'02 manifolds GUARANTEED because they scavenge better, but it would only be 5 or so horsepower. it's up to you whether or not that's worth it to you.

orangefun

iTrader: (5)

every one says crap about shorty headers, but out here in cali , my friend has an 02 t/a M6 with and I stress nothing but JBA shortys and a y pipe, not even a lid or a K&N, if they don't make a difference why would his car trap 109.9 in the 1/4 with only those things? shortys may not peek big hp gains, but they must make great under the curve gains.