Patrick G

iTrader: (14)

No other exhaust for C5s seems to make power EVERYWEHRE like the LG Pro Long tube headers. They seem to make more low end torque than anything else as well. Here's what they are:
1 3/4" primaries, 32" long (longer than most C5 headers)
3" High velocity merge collector
3" x-pipe less than a foot past the HVMCs.
more info here: http://www.lgmotorsports.com/shop/pr...fb2086f9d44363

Anyway, for F-bodies, we are restricted underneath to running an x-pipe so close to the headers, but having said that, what setup would most closely replicate the LG C5 setup?

Maybe QTP 1 3/4" headers, with HVMCs and a custom fabbed 3" x-pipe from Lanes or somebody else? You'd also want to have the mufflers as far back as possible (where they would have less of an effect on flow since the exhaust gas cools a lot the further back you go). Since the LG system has proven itself time and time again, I think you'd want to match it as closely as possible with available components. Any thoughts?

cyphur

iTrader: (10)

I think QTP's with the HVMC's paired up to a Lanes setup would work really well. He does great work, and can tailer it to exactly what you want. I've seen a couple of his systems firsthand being built, and he really is a perfectionist, paying attention to every detail.

I think you can get the merge spike w/Kooks as well, I remember someone asking Nick @ Kooks about that and he said it IS an option. Both QTP and Kooks are second to none, can't go wrong.

Patrick G

iTrader: (14)

Yeah, that's what I was thinking. But another big question is...are the high velocity merge collectors effective in a closed exaust? LG seems to think so, but I've been wondering. Sure adds a lot to the cost.

Birdie2000

iTrader: (15)

I think one of the strong points of the LG system is not only the equal length primaries, but the whole exhaust system looks to be really close to equal length and symmetrical. This is obviously hard to do on F-Bodies, but I think the "tuning" of the exhaust system is why it is so effective.

LS1LT1

iTrader: (16)

Oh, do the LG headers actually incorporate a true high velocity merge collector (as the QTPs truly do)? Spike and all? I wasn't sure if they did or not.

Either way I do agree that the QTPs with the HVMCs are the best LS1 F-body header available...the QTP Tri Y Corvette long tubes are getting some rave reviews and they make power everywhere as well.

RyanJ

How long of a primary can we get under an F-body? Surely its not impossible to bend 4 tubes one more time and push the collectors back a bit to get the longer primaries. And what about the pipes in phase? I guess vs. out of phase. I read something about that stuff a long time ago but totally forgot about it. I think Vizard wrote something about it recently in PHR.

Patrick G

iTrader: (14)

Yeah, in the most recent PHR, they showed a picture of some trick headers that More Performance had on a really hot LS1. They were 4 into 2 into 1 headers with HVM collectors. Very trick looking. Big $$ too I'm sure.

Rick@Synergy

iTrader: (5)

The equal length is the big factor in a good header. thats why the LG's work so well. Every Vette we put them on just shines 10 fold. Talk about killer power. We have a 03 Z06 with stock heads, a cam and Lg's making over 370 at the tires on a MUSTANG dyno. Thats well over 400 on a dyno jet.

I do think the QTP's would be the first choice in comming close to what the LG's have to offer.

Rick

Patrick G

iTrader: (14)

Primary diameter and length is important (1 3/4" diameter and 30+" length is common in F-Bodies), but I think think the collector size, length and configuration is even more important. The LGs have some magic working for them that go outside the normal 1 3/4", 30+" long headers. It would be nice to copy the other parts of the exhaust to mimick their results.

LS1LT1

iTrader: (16)

Some things too consider, there is such a thing as too long of a primary as well, volume versus flow velocity etc.
Based on some people's theories about header design, maybe someone should make some headers with primaries that run all the way to the back bumper; hey if long is always good then LONGER must be better right?

Patrick G

iTrader: (14)

Good point. You can go too long. That's why you want to take a closer look at the LG long tubes. Their primary length and diameter must be spot on. How does it compare to Kooks and QTPs?

Rick@Synergy

iTrader: (5)

My choice would be to see a long tube like this.

-1 5/8 primary,
- 36"long equal length.
- Merge collector
- 2 1/2 collector.

That would be my header.

Rick

matts22

iTrader: (2)

I have been looking into what exhaust setup I'm going to get as well. As far as headers, I'm either going with QTP or Kooks, not sure on HVC, not sure on 1 3/4 or 1 7/8 yet (some are testing this and I'm awaiting results). Then I'm going to get Lane's duals with the Dr. Gas X-pipe shipped to me. I'm going to extend it "under" the axle and out the back. I might even put the mufflers right before the tips instead of before the axle, I'm not sure yet. I think that this will be a very effective setup. I kind of want to dyno test open headers vs. x-pipe dumped vs. out the back through mufflers, but I don't know if I'll get that done. That is the plan for now at least...it'll probably be until the summer before I actually buy everything. I'm not sure whether I want to spend the extra money on HVC since I'll be running through full exhaust either. I don't know whether the duals with Dr. Gas X would complement the HVC or hurt it (since both are known to scavenge the exhaust. Of course I mentioned header sizes. And for brand, I can't decide. Most of the comments regard the y-pipe, which I won't be using. For headers only, I don't know who is best. Anyway, just though I'd mention that I was thinking of that same exact setup as mentioned in the first post. Just not sure yet.

dug

iTrader: (10)

I think the hooker design is best for the f-bodies. The primary tubes are somewhat equal length without going overboard like the slp's. The grot design is nice but not even close to being a equal length header.

You can tell a difference in sound with the equal length headers. The more equal length the header the smoother the tone. Whereas the less equal the more raspy the tone. Slp's sound smooth while the macs are raspy.

From dynos Ive seen cars running hookers or jet hots with bullets and xpipe make the most power and torque.

Patrick G

iTrader: (14)

So Doug, are you saying that Hookers are not a Grotyohahn-style header? Hmmm...interesting. Are you able to verify the variance between primary tube lengths of the Hookers vs. Kooks and QTPs? Wonder about the new Edelbrocks?

dug

iTrader: (10)

I think it was in the dyno post about 1 3/4 vs. 1 7/8, a member said he had the qtp's and said theyre nowhere close to equal length. From pics, the hookers look like they have a couple unnecessary bends for making the primaries equal length.

The stepped edelbrocks are supposed to be based off the hooker design. With the merge collectors they might make the best power but I havent seen any dynos with them runnin duals. Maybe the step design with the 1 7/8 is overkill.

I think for the typical h/c car, hooker lts with drgas xpipe and 3" magnaflow mufflers is about as good as it gets. Mustang guys swear by dr gas xpipes as far as power and sound. Too bad hookers dont come in stainless stell with the same quality as qtp or kooks.

LS1LT1

iTrader: (16)

Exactly, key words being unnecessary bends. Now does the supposedly perfect equal length of those primaries compensate for the fact that the air now has to make more turns before it reaches it's destination?
I'll stick with the QTPs thank you.

matts22

iTrader: (2)

FYI, they do make Hookers in stainless now.

But I won't be buying them. People have had trouble with them, and I have seen a couple swaps for QTP/Kooks were they picked up significant power.

JS

iTrader: (4)

I'll stick with my tried and true (before anyone else did it) 3in HOMEMADE dynomouth with cutout and 3in Y going into a FM merge connected to slightly ported Hookers...

124MPH out of a MILD S1 LS6 Headed,TR 224 cammed setup it pretty good if u ask me not to mention thats threw an AUTOMATIC

ram-it

You will not find a header for the fbody that is even remotely close to the LG's in design because for clearances. The vette has an abundance of room to run the true duals, cats and x-pipe unlike the fbody. You might be able to get a custom set made and have a custom dual set up fabbed but they will not be 32" long primaries.