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Forced Induction SystemsDetailed discussions regarding cold-air intake systens, superchargers, turbo chargers, and other induction systems for your vehicle.
This is a discussion thread titled "Doug Thorley 5.7L Headers", within the Forced Induction Systems forum, part of the Technical & Vehicle Assistance Forums category.
Currently URD is selling the new DT 5.7 Tundra headers for $634. Next week the price will go up to $649.
Here is what we can do for the forum folks, if when you purchase them online at the URD site you can enter coupon code TN57H at checkout you will get them for the current $634 price with FREE SHIPPING to any address in the Continental US.
The coupon will be good for the first 20 customers only then it will automatically expire.
It is a good deal and if you are thinking about getting them you should act swiftly!!
When I installed the TRD rear sway bar on my Tundra, I posted, "it was the best money I have spent on my Tundra".
I was wrong, it was the second best money I have spent on my Tundra, the first place position has been reassigned to Doug Thorley Headers! These things are bad azz! Let me tell you why....
I just went for a 100 mile loop, with a mix of 25 to 35 miles of city driving and the rest on the Interstate. In the city it drove/felt about the same as stock, just cleaner (if you know what I mean), more linear. If you need to gain some more speed it felt like it happened quicker then before. Once I got on the Interstate the clarity of what had changed just kicked me in the teeth! Cruising at 70mph with an open road, I stabbed the go pedal and I was at the speed limiter (110mph) so quick I thought my truck had a mechanical failure. Simply exhilarating!
I don't know how Doug Thorley came up with there dyno sheets without showing big gains from 3000 to red-line? Because there is definitely another engine hiding under the hood!
PS: All the mods I have, are included in my signiture!
Last edited by blaster21996; 10-10-2007 at 02:28 AM.
95% of dealers will probably void your power-train warrenty.
Not so! At worst, I was told it would void warranty issues from the HEADERS back. Which means, converters and O2 Sensors, for the bang for the buck, I'll take plan A and enjoy my headers dog!
Only if it can be proven that the aftermarket part direclty contributed to the damage..would a CAI be repsonsible ot the cause of the torque converter failing? No..
__________________
SR5 5.7 Crew Max 2WD
Airaid CAI
Borla Dual Exhaust
Doug Thorley Headers
Undercover tonneu cover
Kenwood KDC-MP38U/Alpine 6 3/4 speakers
Luverne SS running boards
Homelink Mirror
TRD Sway Bar
TRD Sport shifter
Amsoil 25k oil-GULP!
Not so! At worst, I was told it would void warranty issues from the HEADERS back. Which means, converters and O2 Sensors, for the bang for the buck, I'll take plan A and enjoy my headers dog!
Get it in writing!!!!
Headers are a very popular mod over at the corvette forum, and unless you have your dealer sell and install them, most guys get voided power-train.
If your engine or tranny blows up with headers, its pretty easy for the dealer to say that the extra HP caused the problem.
__________________ 2008 Tundra CrewMax Limited 4x4 5.7, White w/ oak leather, Moonroof, NAV, Factory 20's, XM.
2006 Nissan Murano SE Black, Loaded, Black leather, 20" Dubs
2005 Corvette C6 (#581) Coupe 6 spd Black, Loaded, Black Leather, Navigation, XM, Onstar, HUD, F55 Magnetic ride, Z51 Brakes/calipers/sway-bars, Route 66 Exhaust, Intake, Custom Tune, 160 stat. Only 2 runs at the track...12.4s @116mph
When I installed the TRD rear sway bar on my Tundra, I posted, "it was the best money I have spent on my Tundra".
I was wrong, it was the second best money I have spent on my Tundra, the first place position has been reassigned to Doug Thorley Headers! These things are bad azz! Let me tell you why....
I just went for a 100 mile loop, with a mix of 25 to 35 miles of city driving and the rest on the Interstate. In the city it drove/felt about the same as stock, just cleaner (if you know what I mean), more linear. If you need to gain some more speed it felt like it happened quicker then before. Once I got on the Interstate the clarity of what had changed just kicked me in the teeth! Cruising at 70mph with an open road, I stabbed the go pedal and I was at the speed limiter (110mph) so quick I thought my truck had a mechanical failure. Simply exhilarating!
I don't know how Doug Thorley came up with there dyno sheets without showing big gains from 3000 to red-line? Because there is definitely another engine hiding under the hood!
PS: All the mods I have, are included in my signiture!
I'm glad to hear that you are happy with your headers!! Give it some more time to learn and adjust and it will be even better!
Headers are a very popular mod over at the corvette forum, and unless you have your dealer sell and install them, most guys get voided power-train.
If your engine or tranny blows up with headers, its pretty easy for the dealer to say that the extra HP caused the problem.
I thought of that! That's exactly why I am keeping my stock headers on the shelf in a plastic wrap all sealed up. If my engine does have a major melt down, I will have the stockers re-installed for it's visit to the Dealer!
PS:Whats up with your signiture. Did a salesman try and beat you into a purchase?
Last edited by blaster21996; 10-10-2007 at 09:59 AM.
When I installed the TRD rear sway bar on my Tundra, I posted, "it was the best money I have spent on my Tundra".
I was wrong, it was the second best money I have spent on my Tundra, the first place position has been reassigned to Doug Thorley Headers! These things are bad azz! Let me tell you why....
I just went for a 100 mile loop, with a mix of 25 to 35 miles of city driving and the rest on the Interstate. In the city it drove/felt about the same as stock, just cleaner (if you know what I mean), more linear. If you need to gain some more speed it felt like it happened quicker then before. Once I got on the Interstate the clarity of what had changed just kicked me in the teeth! Cruising at 70mph with an open road, I stabbed the go pedal and I was at the speed limiter (110mph) so quick I thought my truck had a mechanical failure. Simply exhilarating!
I don't know how Doug Thorley came up with there dyno sheets without showing big gains from 3000 to red-line? Because there is definitely another engine hiding under the hood!
PS: All the mods I have, are included in my signiture!
You should install intake/exhaust to multiply the gains, now that your engine can more easily move air. Your restrictions now probably lie at the intake and exhaust side of the engine.
__________________ 2007 Tundra DC Limited - Slate Metallic 5.7L 4WD
Red Rock Leather -- Navigation -- TRD Exhaust -- TRD Sway Bar -- Volant Intake -- JBA Headers -- ReadyLift 2.5" front spacer/1" rear blocks -- Pro Comp front coilovers with TRD package springs and Bilstein shocks -- Pro Comp 6066 wheels with BFG A/T KO 305/55R20 -- Bushwhacker Pocket Fender Flares (Color Keyed)
You should install intake/exhaust to multiply the gains, now that your engine can more easily move air. Your restrictions now probably lie at the intake and exhaust side of the engine.
I realize that, but, I went that route on my last truck with a "CIA" and a "Gibson" cat back. The increase in db was not worth the gain in performance. Also, if you look at a dyno chart (most show 12hp gain) of the most popular cat back you may leave with the impression that the stock Tundra exhaust is darn efficient.
I realize that, but, I went that route on my last truck with a "CIA" and a "Gibson" cat back. The increase in db was not worth the gain in performance. Also, if you look at a dyno chart (most show 12hp gain) of the most popular cat back you may leave with the impression that the stock Tundra exhaust is darn efficient.
Did you have headers on your last truck?
__________________ 2007 Tundra DC Limited - Slate Metallic 5.7L 4WD
Red Rock Leather -- Navigation -- TRD Exhaust -- TRD Sway Bar -- Volant Intake -- JBA Headers -- ReadyLift 2.5" front spacer/1" rear blocks -- Pro Comp front coilovers with TRD package springs and Bilstein shocks -- Pro Comp 6066 wheels with BFG A/T KO 305/55R20 -- Bushwhacker Pocket Fender Flares (Color Keyed)
No! NISMO offered them, but I did not see a dyno chart that motivated me to purchase them. The problem with my last truck was ECU. Most vehicles that operate on a fly by wire system, such as the Tundra and the Nissan. Use a pretty responsive ECU that makes it seamless. The Nissan I had always felt like the computer on board was an old 286 machine. Just really slow! If you smashed the pedal, you could count to 3 Mississippi before the truck would move. Because of this reason, I stopped investing in go fast goodies for it, even though STEVE STILLEN came out with a SC for it!
Last edited by blaster21996; 10-10-2007 at 01:48 PM.
Re: Doug Thorley 5.7L Headers
I don't see how!
But you are correct, I am extremely HAPPY with the purchase! 
Linear Mode
