I am torn: LG or QTP Headers
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 9,057
Likes: 667
From: Norcal
I am torn: LG or QTP Headers
We all know the LG's are bad @ss and this set has the high flow cat option as well, but for the same price I can have a full set of QTP's with no cats and Electronic cutouts. My logic says get the LG's, my ***** say get the QTP's.
I want to have the cutouts and think that is bad ***. I need to run cats and figure for $120 I can order a set and make the QTP's good to go. If I want to even out the LG's it will cost me another $450 just to get a set of cutouts for it. What to do???
I want to have the cutouts and think that is bad ***. I need to run cats and figure for $120 I can order a set and make the QTP's good to go. If I want to even out the LG's it will cost me another $450 just to get a set of cutouts for it. What to do???
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 9,057
Likes: 667
From: Norcal
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
tri-Y's have been known as a torque producing header. In simple comparison, the Corvette C6R runs a tri-Y exhaust system with an engine that doesn't turn over 5400 RPM I believe.
I am just uncertain as to how well they will work at higher rpm's. Generally, you can't have it both ways.
Me, I still like the LG and Dynatech with the LSx motor.
I am just uncertain as to how well they will work at higher rpm's. Generally, you can't have it both ways.
Me, I still like the LG and Dynatech with the LSx motor.
Race Director
Joined: Sep 2003
Posts: 13,550
Likes: 6
From: Now in God's Country, the Big Sky, Montana!
Cruise-In 7-8-9-10 Veteran
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
LGs without cats and then the cutouts.
Lemme know if you want a set of the LGs, I'll ship 'em for free.
Jason
Lemme know if you want a set of the LGs, I'll ship 'em for free. Jason
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I am one of the few running QTP's here. They are well made quality headers with heavy gage tubes. They tuck up tight against the body. I have heard the cutouts when Barry (QTP) had them on his truck at Carlisle, holy crap that was great. My wife just wasn't as impressed though 
QTP's are also all stainless and the headers themselves mate to the Random Tech cat/X-pipe so I think you can add cats later (talk to Barry first) and you can also go 3" if you want as well but with the cutouts you may not need to. They fit well, install easy and the front O2's plug right in almost where the stock location was so there is no contact with the tunnel plate or other installation issues that I have seen with other systems.
There are a few of us running QTP's but we don't talk much
QTP's are also all stainless and the headers themselves mate to the Random Tech cat/X-pipe so I think you can add cats later (talk to Barry first) and you can also go 3" if you want as well but with the cutouts you may not need to. They fit well, install easy and the front O2's plug right in almost where the stock location was so there is no contact with the tunnel plate or other installation issues that I have seen with other systems.
There are a few of us running QTP's but we don't talk much
Last edited by vettenuts; Dec 13, 2007 at 05:49 PM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
tri-Y's have been known as a torque producing header. In simple comparison, the Corvette C6R runs a tri-Y exhaust system with an engine that doesn't turn over 5400 RPM I believe.
I am just uncertain as to how well they will work at higher rpm's. Generally, you can't have it both ways.
Me, I still like the LG and Dynatech with the LSx motor.
I am just uncertain as to how well they will work at higher rpm's. Generally, you can't have it both ways.
Me, I still like the LG and Dynatech with the LSx motor.
Le Mans Master
Joined: Feb 2006
Posts: 5,488
Likes: 4
From: USA
I am one of the few running QTP's here. They are well made quality headers with heavy gage tubes. They tuck up tight against the body. I have heard the cutouts when Barry (QTP) had them on his truck at Carlisle, holy crap that was great. My wife just wasn't as impressed though
QTP's are also all stainless and the headers themselves mate to the Random Tech cat/X-pipe so I think you can add cats later (talk to Barry first) and you can also go 3" if you want as well but with the cutouts you may not need to. They fit well, install easy and the front O2's plug right in almost where the stock location was so there is not contact with the tunnel plate or other installation issues that I have seen with other systems.
There are a few of us running QTP's but we don't talk much
QTP's are also all stainless and the headers themselves mate to the Random Tech cat/X-pipe so I think you can add cats later (talk to Barry first) and you can also go 3" if you want as well but with the cutouts you may not need to. They fit well, install easy and the front O2's plug right in almost where the stock location was so there is not contact with the tunnel plate or other installation issues that I have seen with other systems.
There are a few of us running QTP's but we don't talk much
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
No, MN6. At the time I installed mine, there were no 3" cat back options, now there are a few. I think larger cats (on any header system) will help. However, the OP doesn't plan to run cats so I guess that is not an issue for him.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
If you like the Stock tri-y stay with the stock header. There is not the room for an after maket tri-y long tube header. That is also why the stock headers are actully very good.
The C6R uses side pipes that come out in the back of the front wheel well, then down the side of the car.
The C6R uses side pipes that come out in the back of the front wheel well, then down the side of the car.
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
We all know the LG's are bad @ss and this set has the high flow cat option as well, but for the same price I can have a full set of QTP's with no cats and Electronic cutouts. My logic says get the LG's, my ***** say get the QTP's. I want to have the cutouts and think that is bad ***. I need to run cats and figure for $120 I can order a set and make the QTP's good to go. If I want to even out the LG's it will cost me another $450 just to get a set of cutouts for it. What to do???
I want to have the cutouts and think that is bad ***. I need to run cats and figure for $120 I can order a set and make the QTP's good to go. If I want to even out the LG's it will cost me another $450 just to get a set of cutouts for it. What to do???Do you plan on going with a cam? Then go with headers. If not id say just go for the cut outs.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I don't see the logic in this at all. Tri-Y's have several advantages over the 4 to 1 design.
Jack Burns
"While typical off-the-shelf street 4-into-1 headers do not have secondary pipes, Burns' research has proven repeatedly that his Tri-Y designs make more overall power over a broader rpm range. While traditional lines of thought have street enthusiasts knowing Tri-Y pipes make more bottom-end torque, further research by Burns into the design have resulted in headers making more power all across the rpm range. With more components as part of the Tri-Y design, more tuning possibilities exist, and therefore more potential lives within."
Jack Burns
"While typical off-the-shelf street 4-into-1 headers do not have secondary pipes, Burns' research has proven repeatedly that his Tri-Y designs make more overall power over a broader rpm range. While traditional lines of thought have street enthusiasts knowing Tri-Y pipes make more bottom-end torque, further research by Burns into the design have resulted in headers making more power all across the rpm range. With more components as part of the Tri-Y design, more tuning possibilities exist, and therefore more potential lives within."
Last edited by vettenuts; Dec 12, 2007 at 12:07 PM.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
I just finished a conversation with Burns Stainless about a set of headers for a 427 LS engine.
My parameters were:
Bore: 4.185 inches
Stroke: 3.88 inches
Intake Valve size: 2.20 inches
Exhaust Valve size: 1.60 inches
Cam: 244 int - 256 exh - 118 degree LSA - 0.661 inch lift at the valve
Compression Ratio: 12.0:1
Usable rpm range: 3,500 to 7,500 rpms
Their recommendation is as follows for a 4-into-1 header:
Overall primary tube length: 28.5 inches
The first 1/3 of the tube should be:
- Tube diameter: 1 3/4 inches
- Tube length: 9.5 inches
The second 1/3 of the tube should be:
- Tube diameter: 1 7/8 inches
- Tube length: 9.5 inches
The final 1/3 of the tube should be:
- Tube diameter: 2 inches
- Tube length: 9.5 inches
- The 2-inch end of the primary tubes should come together in a 1 1/2 inch to 3 1/2 inch Merge-Megaphone collector that has a reverse cone at the end to aid in the transistion into my 3-inch X-pipe.
How many of us are driving around with a set of headers made to these specs?
My parameters were:
Bore: 4.185 inches
Stroke: 3.88 inches
Intake Valve size: 2.20 inches
Exhaust Valve size: 1.60 inches
Cam: 244 int - 256 exh - 118 degree LSA - 0.661 inch lift at the valve
Compression Ratio: 12.0:1
Usable rpm range: 3,500 to 7,500 rpms
Their recommendation is as follows for a 4-into-1 header:
Overall primary tube length: 28.5 inches
The first 1/3 of the tube should be:
- Tube diameter: 1 3/4 inches
- Tube length: 9.5 inches
The second 1/3 of the tube should be:
- Tube diameter: 1 7/8 inches
- Tube length: 9.5 inches
The final 1/3 of the tube should be:
- Tube diameter: 2 inches
- Tube length: 9.5 inches
- The 2-inch end of the primary tubes should come together in a 1 1/2 inch to 3 1/2 inch Merge-Megaphone collector that has a reverse cone at the end to aid in the transistion into my 3-inch X-pipe.
How many of us are driving around with a set of headers made to these specs?
Last edited by Pumba; Dec 12, 2007 at 04:37 PM.
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 9,057
Likes: 667
From: Norcal
I would love to run with the LG headers and use the QTP xpipe. Not sure if that would work. It is obvious the LG's are an overall better header, but are they that much better? for the price I am thinking the QTP's are an overall better deal with the cutout option in place. I am running a cam and other supporting mods. Thanks everyone for the info it is appreciated.
