Have fun! 
Suggestions for Headers
Melting Slicks
Joined: Jun 2010
Posts: 2,809
Likes: 3
From: Yorktown Virginia
You cant really go wrong with any of the big name headers such as Lg, ARH or Kooks. Kooks however tends to be more difficult to install and I know my Lg's dropped right in without any trouble at all.
Burning Brakes
Joined: Mar 2007
Posts: 831
Likes: 0
From: Orange Tx
Just my opinion.
Banned Scam/Spammer
Joined: Feb 2007
Posts: 50,093
Likes: 267
From: Oklahoma City
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17,'19,'22
For bolt ons like you have save a bit and buy the Street Series headers. They'll easily support 450 rwhp.
LG also warranties for life so if you have issues 5 years from now you'll be covered (you shouldn't have any issues though).
You can read more about them here http://forums.corvetteforum.com/c5-z...aders-jwm.html
They feature:
-LG Pro Long Tube primary design
-Industry standard 3" collectors
-Included off road pipes
-O2 adapters for the front O2s and plugs for the rears included
-Available with or without cats
-2 1/2" system which matches the stock size
-Stamped 2 1/2" X pipe.
-Complete 304 stainless design.
-Fully Polished system front to rear.
-No cutting or welding.
-VALUE for your dollar. No Complete header system can be had for less.
Lifetime Warranty!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
2" PRIMARIES
Unless your running a stroked high HP engine,, 1 3/4" is more than enough.. Numerous people have done the 1 7/8" vs 1 3/4' primary dyno compareson test and theres wasnt much if any gains where it counts.
Check out the XS Power System.
Bill
Safety Car
Joined: Sep 2008
Posts: 4,753
Likes: 167
From: Youngsville North Carolina
Near LA
http://forums.corvetteforum.com/c5-p...z-shifter.html
Although I don't think I paid much more for brand new ones....
http://forums.corvetteforum.com/c5-p...z-shifter.html
Although I don't think I paid much more for brand new ones....
Banned Scam/Spammer
Joined: Feb 2007
Posts: 50,093
Likes: 267
From: Oklahoma City
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17,'19,'22
LG designs their parts with 30+ years of actual race experience 
I would stick with the 1 3/4 for the C5.
Race Director
Joined: Mar 2008
Posts: 12,413
Likes: 501
From: Rio Rancho NM
1 7/8" here gained almost 40rwhp. They are Stainless Works 1 7/8" 3" test pipes 3" xpipe. They are a piece of art easy to install and priced higher then the XS power but lower then the LG's, Kooks etc etc. I would of went XS but they don't make a 1 7/8" and I plan on adding a blower in the near future. i did a review with a before and dyno sheet. Sound fanstastic with my B&B Prt's.
Pro
Joined: Mar 2007
Posts: 507
Likes: 5
From: Macungie Pa
I have installed Dynatech, LG streets, and am now running Kooks 1 7/8.
First 2 were easy installs. Can't say that for the Kooks. Took it down to just the short block, unfasten the motor mounts and jack right side just high enough that the motor mount stud is flush inside the craddle....then the right side went in. The left side dropped in with very little jacking on the motor. Great fit and no leaks. My butt dyno is very happy with the Kooks.....
The good thing that came out of my install was in removing my heads, I found that I had slight valve/piston contact. The springs I had installed on my heads were not the spec as advertised. Valve float was the culprit as p/v clearence was good, checked the removed springs and were exactly 90lbs lighter on open pressure than what was advertised and the star pattern on the ends of the valves denote spring rotation.
So.....new springs and new Kooks and we're ready for 2012.....
First 2 were easy installs. Can't say that for the Kooks. Took it down to just the short block, unfasten the motor mounts and jack right side just high enough that the motor mount stud is flush inside the craddle....then the right side went in. The left side dropped in with very little jacking on the motor. Great fit and no leaks. My butt dyno is very happy with the Kooks.....
The good thing that came out of my install was in removing my heads, I found that I had slight valve/piston contact. The springs I had installed on my heads were not the spec as advertised. Valve float was the culprit as p/v clearence was good, checked the removed springs and were exactly 90lbs lighter on open pressure than what was advertised and the star pattern on the ends of the valves denote spring rotation.
So.....new springs and new Kooks and we're ready for 2012.....
