timafey

So been back and forth trying to figure out what headers to go with, looked at some Dyno numbers that were posted by a few members. My car will be getting the heads ported with new guides/valves. Super Bee Intake and maybe a cam down the road, but won't be going FI.

Considered Kooks and ARH, but decided to go with the LG Super Pro.

Spoke with an LG engineer and was told to def go with the 1 3/4 for higher torque and an almost identical HP numbers to 1 7/8. He said he recommends 1 7/8 if you have 450+ ci or going with FI.

Does anyone have any back to back comparisons between the 2? Also curious if the LG has a different style collector compared to ARH or others?

Unreal

Yes the collector is a bit different. I've had both ARH and LG. Both are good headers.

KLLRVET

http://forums.corvetteforum.com/c6-z...xperience.html

JUSTAC6

regret my ARH 1 7/8 catted LT. On my 09 Z with the K&N intake setup and everything else stock it doesn't feel any quicker at all or sound any louder/aggressive. I would save the money and use it towards a cam install which you would see better gains and a ported fast.

just my opinion, my last 07 Z just had the K&N intake and my latest Z feels exactly the same.

psp6158

I love my LG's, went with the 1 3/4" also for the reasons you described, just my 2 cents but get them coated,they look great and keep the engine bay cooler...

Unreal

I put the LG 1 7/8" on a haltech intake/tune car. Got ~20rwhp, tons of mid range. No regrets at all. Sounds like the poster above has a broken *** dyno. Headers make a nice difference. For what you want, LG or ARH 1 3/4" would be perfect.

BOO666

ClarksZ06

My Z with 1 3/4 LG's, fast intake, and small/medium sized cam makes wicked mid range power. It's an absolute Killer street setup with excellent drivability.

JUSTAC6

screw the dyno... it can say it added 50 whp across the whole powerband if I can't feel the extra power then I can't feel it and IMO putting that 2k+ dollars to a cam would be more benificial. Even with a "upgraded" intake and Michelin PSS to make up for the whack *** oem tires it doesn't feel any quicker. you sound offended like you are the sole creator of the ARH headers I purchased. might be quicker but after driving the car after a stock Z it wasn't worth the money IMO.

carpe dm

Unreal

The great thing about dyno/track is it is real numbers, not opinion. In your opinion it wasnt worth it. Most people feel otherwise, and in reality they do add power. If the added power is worth $1500, that is a personal thing. Just because the power wasn't worth it to you doesn't mean the OP will feel the same way.

JUSTAC6

yea track numbers are great and do tell a different story but like dynos there are too many factors that come into play to even determine the gain being "worth it". 1500 is on the cheap side of headers as well, ARH with cats are over 1600 new without installation or tuning and the needed oil change because of the oil line removal. So like I said over 2k dollars without the added intake price of 500 dollars for 20 whp. I am in no way saying going a different route is the best/only option just sharing an opinion on the subject.

Unreal

I install all my own parts. Oil change is an oil change, just do it when you are close to one. I went from 450rwhp to 500rwhp with intake/headers/tune for $1700. To me, that is a great deal and not many cars get that much power from such simple mods. As long as the buyer knows what he is getting, only he can make up his mind if that is worth it.

timafey

The problem is you can't just do a cam without doing headers. What did your car actually pickup on the dyno? Did you get a tune to go along with your LT?

timafey

actually what made me decide to start thinking about what is the best choice for my setup!

JUSTAC6

who said you can't do a cam withou headers? there are a few cars running oem exhaust with cams and ported heads, no reason you can't make a respectable hp without headers.

ZF Six

I have a good friend with an 08 Z06 and when we talked to our tuner about headers he recommended going 2" Kooks. So that's what went on, and with those headers, tune, and an Air Raid (was already on the car) intake it picked up 58rwhp and 68rwtq. The car runs extremely hard!

You have a 427, go with 2" headers!

0MarylandSpeed

Z06 we always recommend 1 7/8" as they perform the same down low as 1 3/4". There is no disadvantage, and they make higher top end power.

0Anthony @ LGMotorsports

Yes and no.

On a stock LS7 with the only other modification being the intake a 1 3/4 will make more torque til around 3800 RPM then they generally meet for a bit and do not change much after that.

The more modifications that are done to the car the more this can split. If we are talking about a cam'd car the cam can effect this as well but once you start making over 520 or so rwhp the 1 7/8 will make more HP over 5000 RPM, again depending on the setup.


That isn't to say you can not make power with the 1 3/4 as we have put down 624 rwhp with them...just depends on where you want to focus the power at RPM wise.

timafey

So if going with the cam you would recommend the 1 7/8? Think my car should be right at 520 after the mods, would rather make it more future proof if the isn't much difference between the 1 7/8 and 1 3/4 in case I do a cam? What was the reason for going with 1 3/4 in the 624whp setup? Would the larger header make more power?