will headers for an 01 work on a 99? I believe the cut off is 97-01?

 

Nope the air inlets or on different cylinders than the '97/2000, not unless you have the pass side air tube off the 01...or you can exstend the air hose by cutting the metal tube and splice it with hose.

 

Some guys have actually bent it to fit. It's the Passenger side that is different, I'd say if you got a great deal on some Headers pending then go for it!

 

$1200 for LG pro's, x pipe, and mids that are two months old. Couldn't I just get a longer house or something, I assume since I have the X-pipe and mids no welding will be involved? I helped to some long tubes on a 05 GTO and it was a pita to do the headers becuase you had to disconnect the steering linkage, is it the same for a C5?

 

SleeperC5's method would work just fine! The only thing that comes to mind is that when the AIR pump is not on (which is most of the time) exhuast gases might reach the splice hose and melt it. I'd kinda lean towards bending your metal pipe to reach the new AIR flange postion, it's on the next primary...

Yeah they should fit in just fine, especially since they were already installed once. I didn't have to remove the steering shaft on my install, I did remove the alternator, coils and plugs... I'd check out LG's website, I'm sure they have instructions posted.

 

I assume I will need new exhaust gaskets? ill check LG now see if they sell just the gaskets, and look into their install page.

 

From LG's website
THE MOST POWERFUL CORVETTE HEADER ON THE PLANET

* The Torque Monsters of the Corvette World No Corvette Header has more TORQUE or HORSEPOWER
* Built by Borla exlusively for LG Motorsports
* All Stainless Steel mandrel bent construction using 304 stainless alloy
* These headers are true long tubes at 32 inches long
* 1.75 inch primary tubes, perfect for mild to wild LS engines
* Full 3 inch X pipe standard and included
* Race style 3inch Merge Collectors for better scavenging
* Available 3 inch premium high performance Metal Matrix Catalytic converters (no converter flows more)
* Included "off road" pipes for track use
* Available with or without Cats
* Race proven design makes more low end torque than any other brand, allowing you to have more of your engines power on hand at low RPM while still producing fantastic peak horsepower.
* These headers have been tested on idependent dynos by outside experts and show proven increased horsepower and torque over other top brands
* Easy bolt on installation with NO CUTTING or WELDING
* Great fit and finish with no ground clearance issues
* Note: Long Tube Headers are not CARB certified



Now all I need is a lift, didn't see any directions on their website though .

 

Get new gaskets... Some have been able to re-use the stock ones but mine fell apart.

Exhaust manifold gaskets G.M. PN 12558573(old) New is 12600530

I don't have a P/N for the AIR tube gaskets.

You could go by this link for the install;

http://www.ls1howto.com/index.php?article=17


Good luck!

Tim

 

Wow he has basically the same set up as me and got the same numbers I want except I got the LG pro's that was a great write up and now I know what you guys mean by 02 tubes it looks plenty long enough to just bend and move where it goes.

Getting my car in the air is the real challenge it's lowered all the way on stock bolts and is no fun to even get on a low profile lift.

 

It's easier said than done to bend those SS tubes, but it can be done. I'd do it right and get the tubes for an 01+ and replace the old ones.

You got a great price on a great header system.

 

Where could I get those Tubes? That does sound a heck of a lot easier, I'm assuming i can get these gaskets and such from Napa, or Autozone? I'll have to check with them.

Yeah I have always wanted the LG's but was going to settle for some Kooks, just the headers with stock H-pipe (budget of 2k) now I got the complete exhaust to link up to my Bassani catback and the LG pro's I wanted. Should sound nasty with my comp 228/224 114 LSA. Now all I need are some nice ported after market heads and intake manifold.

 

I dont know if they have changed but for early cars LG did not used to make a different header they would just send you a right side AIR tube for a later car. You can buy the AIR tube from the dealer or there should be tons of them floating around from people that have removed the AIR system. If you are going to run cats you should leave the AIR on the car. I have found it is much easier to remove the intake to replace the AIR tube.
You should be able to reuse the manifold gaskets no problem if you do get new gaskets get the stock type MLS for an LS1 not a LS6. The AIR gaskets are usually reuseable as well as long as you are carefull

 

I have the air tube,brand new from gmpartshouse.com.I purchased it for the same reason you need it for,but I then decided to sell my pro's.
I do not remember how much it cost,I will have to look it up.
If interested,pm me

I would like to get most of my money back for it,but I will discount it a bit for ya.

Oh yeah, I almost forgot.....I think you need a new,different dipstick as well,which I also have.Again, at a slight discount

 

Joe,
1. Wow, I personally don't see any way you could bend the '99 passenger-side AIR tube to fit the later headers, it just appears to be too short, and it would be pretty ugly if you could. But the driver side will fit pretty easily.
2. Yes, you can cut/splice the passenger side with a hose, but as stated above, that hose will get pretty hot, and look kinda funky.
3. You can buy the '01 passenger-side AIR for about $50 from GMparts direct or other online sources. BUT, to install it, you MUST remove the intake manifold, and become intimate with the hardest-to-reach bracket bolt in the Corvette World.
4. Also, the oil dipstick will probably not work, the support attachment will be in a different place. You can rig it, or just buy an '01 oil stick and tube.
No other issues, headers/pipoes should bolt right on the '99.

So, you have choices, rig it, or make it look factory for about $80 extra.
Either way, that price for a full LG Pro setup looks really good.

DG

 

LG includes those in their kits, so you could probably get them from LG. You can also definately order them from GM Parts house.

I'd take Flynbya2's offer up and get them from him.

BTW, the dipstick can be hell to get back in if you don't know where it goes, so take a mental note when you pull it out, and look at the port before you put the header in.

Follow LS1howto's instructions and you'll be fine.

 

hey just finished this project. i ran in to the same prob. i ordered the right headers but once i installed them i noticed they were the wrong ones, air tube was for a 01 up. i did not want to remove the intake right now to install the new air tube since its in my plans to add a ls6 intake and ill do that then. so for now i cut and spiced with a fire resistant hydrallic hose and rewrapped it in the black wrap so it looks stock. hope this helps

 

I wont be running cats so do I even need to reconnect it? I'm not sure what it is this system actually does.

 

the secondary air system injects air into ur exhaust to mix with the unburnt fuel from cold start. this in return heats the cats up quickly to help emissions. if u are deleteing ur cats and do not plan just buy the race headers that do not have air fittings and get rid of the hole system or just cap it off. getting rid of it cleans the engine bay up nicely. u will need to have the rear cats turned off in the tune or buy sims.

 

That sounds a lot more simple, I will just cap them off for now, later when I do a Ls6 Intake I will remove it all together.