Exhaust Manifolds?
Exhaust Manifolds? So I'm about to buy some shorties(Yes, live in CA thank you) and was curious if I need to swap my exhaust manifolds out for either some later model ones('01-'02's) since I heard they flow better or is there any place where I can get some aftermarket ones?
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Joined: Jun 2005
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From: England
Originally Posted by RrCoX22
So I'm about to buy some shorties(Yes, live in CA thank you) and was curious if I need to swap my exhaust manifolds out for either some later model ones('01-'02's) since I heard they flow better or is there any place where I can get some aftermarket ones?
Shorties are manifolds, so what question are you asking. I'm a bit confused.
IMO Save the dosh and the hassel, apart from being able to brag you have done headers shorties and arguable mids will offer pretty much bugger all on mildly tuned engine.
If you're after a 500bhp n/a monster its a different matter, but LT's would be whats needed.
If you're really after more power save for a Procharger.
I'd do this
Originally Posted by 300bhp/ton
eh?
Shorties are manifolds, so what question are you asking. I'm a bit confused.
IMO Save the dosh and the hassel, apart from being able to brag you have done headers shorties and arguable mids will offer pretty much bugger all on mildly tuned engine.
If you're after a 500bhp n/a monster its a different matter, but LT's would be whats needed.
If you're really after more power save for a Procharger.
I'd do this
Shorties are manifolds, so what question are you asking. I'm a bit confused.
IMO Save the dosh and the hassel, apart from being able to brag you have done headers shorties and arguable mids will offer pretty much bugger all on mildly tuned engine.
If you're after a 500bhp n/a monster its a different matter, but LT's would be whats needed.
If you're really after more power save for a Procharger.
I'd do this
, joking, but LTs wont pass emmissions in Cali, id just get some later model mani from a junk yard or something and save some $$ 
TECH Fanatic
Joined: Sep 2003
Posts: 1,570
Likes: 1
From: San Diego, CA
haha your dumb , joking, but LTs wont pass emmissions in Cali, id just get some later model mani from a junk yard or something and save some $$
you just have to search for a cool test only station.
and imo. iy would be very stupid to waste the TIME, and $$$ so swap out to stock manafolds of another year!
either get LT's, ORYP, and a good catback..... or just leave your entire exhaust STOCK!
haha i live in NY which is also hard to pass smog, but if u can pass with an ORY in CA, i can pass with LTs and uncatted TDs, im so much happier now 
, well if he can pass CA with LTs then get em!
Another shorty header post down the tubes. Can't anyone answer the inevitable shorty header question without suggesting longtubes? Yes, everyone knows they make more power but not everyone wants to run em. You can see up to 12rwhp depending on mods if you have a pre 00' motor. If you are concerned about staying smog legal, then get shorty headers and not 01'/02' manifolds. The 01' & 02' manifolds don't have egr ports so you'd have to delete yours. Plus a good shorty header will be SLIGHTLY better than 01'+ manifolds. Just pick up a set off the classified section for cheap. I bought brand new JBA shorties for $225 and have seen them for as low as $175 brand new. If you want to stay legal and have a 98 or 99, I think 10-12rwhp for $225 is just as good a hp to $ ratio as many other mods. 
Originally Posted by Redneck Z
Another shorty header post down the tubes. Can't anyone answer the inevitable shorty header question without suggesting longtubes? Yes, everyone knows they make more power but not everyone wants to run em. You can see up to 12rwhp depending on mods if you have a pre 00' motor. If you are concerned about staying smog legal, then get shorty headers and not 01'/02' manifolds. The 01' & 02' manifolds don't have egr ports so you'd have to delete yours. Plus a good shorty header will be SLIGHTLY better than 01'+ manifolds. Just pick up a set off the classified section for cheap. I bought brand new JBA shorties for $225 and have seen them for as low as $175 brand new. If you want to stay legal and have a 98 or 99, I think 10-12rwhp for $225 is just as good a hp to $ ratio as many other mods.
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TECH Addict
Joined: Jun 2005
Posts: 2,660
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From: England
Originally Posted by Redneck Z
Another shorty header post down the tubes. Can't anyone answer the inevitable shorty header question without suggesting longtubes? Yes, everyone knows they make more power but not everyone wants to run em. You can see up to 12rwhp depending on mods if you have a pre 00' motor. If you are concerned about staying smog legal, then get shorty headers and not 01'/02' manifolds. The 01' & 02' manifolds don't have egr ports so you'd have to delete yours. Plus a good shorty header will be SLIGHTLY better than 01'+ manifolds. Just pick up a set off the classified section for cheap. I bought brand new JBA shorties for $225 and have seen them for as low as $175 brand new. If you want to stay legal and have a 98 or 99, I think 10-12rwhp for $225 is just as good a hp to $ ratio as many other mods.
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QUOTE: I think he forgot to add a decimal 1.0-1.2 rwhp...
Ha ha very funny, lol.
Optimistic or not, this is not a short tube vs. longtube debate.....thankfully. I have seen shorty header gains of 12 rwhp with heads and cam on 98's and 99's. On a mild bolt on car maybe 8 rwhp. Honestly if LT's were an option for me I wouldn't even look at shorties. There I go getting sidetracked, this wasn't the question.
Ha ha very funny, lol.
Optimistic or not, this is not a short tube vs. longtube debate.....thankfully. I have seen shorty header gains of 12 rwhp with heads and cam on 98's and 99's. On a mild bolt on car maybe 8 rwhp. Honestly if LT's were an option for me I wouldn't even look at shorties. There I go getting sidetracked, this wasn't the question.
Yeah, keep the stockers for now. I saw a magazine article which dynoed several 1 5/8 & 1 3/4 mid length and shorties and very little hp increase. Using a later year, will delete you EGR which will not be smog compliant (if thats what you are trying to stay)
Did you see this by the way?
https://ls1tech.com/forums/showthrea...86#post3301386
Did you see this by the way?
https://ls1tech.com/forums/showthrea...86#post3301386
QUOTE: I saw a magazine article which dynoed several 1 5/8 & 1 3/4 mid length and shorties and very little hp increase.
Was it a 98'-99' vs. 00'-02' that was tested? That would make a big difference.
Was it a 98'-99' vs. 00'-02' that was tested? That would make a big difference.
Last edited by Redneck Z; Aug 5, 2005 at 03:51 PM.
TECH Addict
Joined: Jun 2005
Posts: 2,660
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From: England
Originally Posted by Redneck Z
QUOTE: I saw a magazine article which dynoed several 1 5/8 & 1 3/4 mid length and shorties and very little hp increase.
Was it a 98'-99' vs. 00'-02' that was tested? That would make a big difference.
Was it a 98'-99' vs. 00'-02' that was tested? That would make a big difference.
Shorties are like alcohol free beer, they'll give you head ache but you won't have any fun getting there!
Stay stock if LT's arn't viable and spend the dosh on other mods
Last edited by 300bhp/ton; Aug 5, 2005 at 04:49 PM.
Dynos can only be so accurate, but the manifolds on the 00-02 cars are proven to be better. Gains from shorty headers are much better on 98's and 99's vs. 00-02's. Yes, it would make a difference.
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Joined: Jan 2004
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From: Los Angeles, CA
Too bad you have a '99, 2000 and newer no more smog for CA
http://www.smogcheck.ca.gov/StdPage....ck/doineed.htm
http://www.smogcheck.ca.gov/StdPage....ck/doineed.htm
I don't know when LT's became illegal. I had them on my IROC and always passed. I'm going to try them this time around. As M6HuggerSS said, there are planty of people running them here in CA.