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GT Performance Mods 2005+ Mustang GT Performance and Technical Information

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Old 5/15/08, 7:48 PM   #1
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Dean

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Pulled trigger on LT's

Just ordered the OBX LT's. Could not get passed the price, and all you that have them seemed happy with the way they are holding up and performing. So...... I will try out both H-pipes and the one I like the least I will cut and clamp on cats so I can pass inspection (will still cost less than any other LT setup).

Please no product bashing. I know that buying American is important But the USD value is not getting any better, and my pockets are not getting fat very fast. As you have guessed, cost is a factor. If I had more $$$ to spend then I would have gone with BBK because I really wanted a ceramic coating. But SS is nice too.
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2006 GT, 5 Speed, 3.55, V3 non-cooled, Brenspeed 93 octane tune, Delete Plates, OBX LT's, O/R H
12.56 @ 108.72 NA
12.048 @ 116.71 1.885 60ft 8psi V3
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Old 5/15/08, 7:51 PM   #2
 
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Don't have to justify it to us. You made a good choice as everyone has been happy with them. Enjoy the LT's they are awesome.
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Old 5/15/08, 7:53 PM   #3
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Good luck with them. Are you going to install them??
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Meziene E-pump/Steeda UDP,Delete Plates/Accel COP/C&L Racer CAI/American Racing headers catted H/GTA axel back/Pro 5.0 with Hurst stick &"T" handle/Prothane MM/CHE K-Member w-torque limiters/Spyder DS/J&M LCAs/BMR UCA mount/CHE Adj. UCA, Panhard Bar Brace/Steeda Adj Panhard Bar/Boss 429 Hood Scoop. Cervini Ducktail Spoiler/Spec-D S&S/Powerslot & Hawk HPS/Sequential Tail Lites/BMR F/R Sway Bars/GT CS rear bumper cover
Tillman Speed Dyno Tune 307 rwhp & 322 rwtq
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Old 5/15/08, 7:54 PM   #4
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Ok, soooooo, lets not keep us all in suspenders where did you get them and for what price????? Inquiring minds want to know
BTW, congrats on the new LT's let us know how you like them
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Performance Mods: C&L Racer CAI + AMSOIL filter, w/ 93 octane dyno tune by Tillman Speed, Borla Stinger axleback, CHE K-member brace w/torque limiters
Exterior Mods: GT500 conversion., GT500 style rims, Kumho Ecsta ASX 255/50-17 tires, clear front turn signals, BSM GT500 slate gray stripes w/matching rocker stripe, G2 painted calipers, shortie antenna, Agent 47 mirrors painted
Interior Mods: SHR Satin "GT" cupholder bezel, MGW e-brake handle and power oultet plug, GT500 pedals, RedlineGoods black leather shift boot
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Old 5/15/08, 9:48 PM   #5
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Congrats dude. When you hear your car for the 1st time after the install you will have a smile a mile wide!!! I know I did when I heard my car on the dyno!!! The sound is SICK!!! Good luck with the install.
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2006 Mustang GT: Vista Blue, Dk Charcoal Leather, 5-speed
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Performance & Engine Bay:
Airaid CAI; Tillman Speed Tune, American Racing Long Tubes, Catted H-Pipe; Borla Stingers; Painted (to match car) Strut Tower Brace; Redline Tuning QL Elite hood struts, Midwest Auto Engine Plenum Cover & Rad Cover Extensions; UPR Satin Strut Caps; Steeda Brushed Fuse Box Cover
Exterior:
10" Painted Stripes- Performance White, 18" Shelby CS67 wheels, GT/CS Rear Bumper, CDC Classic Chin, Street Scene Ducktail Spoiler & Center Mounted Fog Light Grill, w/tribar pony emblem; Blue Painted Calipers by G2; Web Electric Sequentials; Midwest Auto Vista Blue Mirror Caps,; ULCC Chrome Taillight bezels
Interior & Trunk
Pioneer AVIC-D3 NAV/DVD HU; Custom "Mach1 Style" Stitched Seat Inserts; Ultimate Pedals Frosted Anti-Slip Pedals; MGW Satin Aluminum E-Brake Handle; Redline Leather E-Brake boot; Custom Embroidered TriBar Headrest & Seatbelt Wraps; NinoSport Blue Vinyl Doorsill Lettering; Blue Door Welting; GDM Custom Trunklid Mat (06VistaBlueGT); GT Concepts LED Trunk Lights.

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Old 5/15/08, 10:52 PM   #6
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Originally Posted by GTMark052 View Post
Ok, soooooo, lets not keep us all in suspenders where did you get them and for what price????? Inquiring minds want to know
BTW, congrats on the new LT's let us know how you like them
you can find them on ebay for less than $500 shipped. I bought mine from I guy with the username of dialod.
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Old 5/16/08, 12:24 AM   #7
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I bought them from Seller racingpartsdepot on ebay. Paid $481 shipped. If they guys that do own them are right about the quality then the price is SWEET! I will let ya'll know if the seller is worth buying from again when I get them.

My wife's uncle has an engine lift so he will help me with the dirty work, and make my life easier. And for a case of beer the install cost will be hard to beat!

I hope the factory mufflers can keep the sound down, I love sleepers. When they are quiet cops don't pay as much attention and also people don't have a clue what you got under the hood as you put them in the rear view mirror.

One question, anybody running a PD SC with these headers? I have plans for a Kenne Bell next summer and would like to know how they handle the heat with a sc.
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2006 GT, 5 Speed, 3.55, V3 non-cooled, Brenspeed 93 octane tune, Delete Plates, OBX LT's, O/R H
12.56 @ 108.72 NA
12.048 @ 116.71 1.885 60ft 8psi V3
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Old 5/16/08, 12:37 AM   #8
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I am running a roots type supercharger on about 11 lbs of boost and they are just fine with it.
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Screaming Yellow Custom striped Pearl '05 GT, Magnacharger with C&L CAI, OBX stainless long tubes, Offroad H-pipe, Steeda Tri-Ax shifter, FRPP 4.10 gears, Black Bullit Wheels, Eibach Pro Kit, SCT Tuner, bamachips custom tune, BMR Adjustable Panhard Rod, CHE LCA relo brackets, adjustable upper control arm, CHE K member brace with full spherical torque limiters, Shelby CS6 Hood, SS Gen1 Front fascia, Agent 47 Ram-Air, Cervini Ducktail, Nitto NT555 tires.
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Old 5/16/08, 7:19 AM   #9
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Quote:
Just ordered the OBX LT's. Could not get passed the price, and all you that have them seemed happy with the way they are holding up and performing. So...... I will try out both H-pipes and the one I like the least I will cut and clamp on cats so I can pass inspection (will still cost less than any other LT setup).

Please no product bashing. I know that buying American is important But the USD value is not getting any better, and my pockets are not getting fat very fast. As you have guessed, cost is a factor. If I had more $$$ to spend then I would have gone with BBK because I really wanted a ceramic coating. But SS is nice too.
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you have made an excellent choice w/ headers..... im not on a budget, but still chose OBX. they are the price headers should be for these cars. no point in paying more. also stainless will be fine. ..... heat is not an issue for me, i've finally found a good use for the shaker hood. also i see you're in texas.... the H w/ the resonator will pass our visual inspection. im in the piney woods (easttexas). good luck w/ the install.... i should be very do-able.
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Performance Mods: Pro Chamber; IMCO Axlebacks; Hurst Shifter; MIL Eliminators; CMCV Delete; Steeda Underdrive Pulleys; Steeda Elbow; Brenspeed Tune; Drilled & Slotted Rotors; & Royal Purple
Appearance Mods: Street Scene Ducktail; SHR Honeycomb Panel; Black Billet Fuel Door; CDC Chin Spoiler; Shorty Antennae; Bumper Plugs; Painted Calipers; Moss Tail Light Bezels; H10/H13; Agent 47 Mirrors; Black Turn Signal Lights; Silver Horse Louvers; Shelby GT Rear Valance; Shelby Side Rockers; Mach 1 Hood Stripe; Shaker Hood; & Black Foose Rims
On the Way: Aluminum Drive Shaft; Electric Water Pump
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Old 5/16/08, 8:31 AM   #10
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You'll like the OBX headers. I have been running them since Xmas and they fit just fine and heat has not been an issue up to now anyway.
Scott
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2005 Performance White GT Vert Parchment leather interior, side airbags, premium machined 17 inch wheels, shaker 500, IUP dash upgrade, automatic transmission. Ordered on 1/8/05 and arrived on 3/18/05

A bunch more mods than I'm allowed to post. :-) I hate limits!

Final Dyno #'s 315/311 on 2/15/08 at Brenspeeds
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Old 5/16/08, 12:49 PM   #11
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Dean

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Thanks for the words of incouragement! I hope all goes as planned!!
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2006 GT, 5 Speed, 3.55, V3 non-cooled, Brenspeed 93 octane tune, Delete Plates, OBX LT's, O/R H
12.56 @ 108.72 NA
12.048 @ 116.71 1.885 60ft 8psi V3
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Old 5/16/08, 2:44 PM   #12
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Keep us informed, I am intrigued. To all others with them I have basic boltons and delete plates. what kind of gains are you guys experiencing with these??
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Old 5/16/08, 2:45 PM   #13
 
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I don't have any dyno results before or after. I live in a one horse town with no dyno!

I can say that it feels fast and sounds a hell of a lot faster.
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Old 5/16/08, 3:10 PM   #14
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Originally Posted by firestang70 View Post
Keep us informed, I am intrigued. To all others with them I have basic boltons and delete plates. what kind of gains are you guys experiencing with these??

If you are still running your stock H-pipe with cats and go to any longtube with no cats you can expect about 20-25 rwhp gain. Half of the that gain comes from losing the cats and the other half from better breathing. If you are all ready running an offroad pipe your gain would be only 10-12 hp.
Scott
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2005 Performance White GT Vert Parchment leather interior, side airbags, premium machined 17 inch wheels, shaker 500, IUP dash upgrade, automatic transmission. Ordered on 1/8/05 and arrived on 3/18/05

A bunch more mods than I'm allowed to post. :-) I hate limits!

Final Dyno #'s 315/311 on 2/15/08 at Brenspeeds
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Old 5/16/08, 9:35 PM   #15
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Quote:
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If you are still running your stock H-pipe with cats and go to any longtube with no cats you can expect about 20-25 rwhp gain. Half of the that gain comes from losing the cats and the other half from better breathing. If you are all ready running an offroad pipe your gain would be only 10-12 hp.
Scott
My JLT and 93 race tune is said to be worth about 20-27 whp and 20 wtq, that cut my 1/4 mile times by .8 sec. So adding anouther 20-25 whp should make this car feel like a new machine! How much time should I expect to shave by trashing my stock h-pipe and manifolds? Anybody have time slips with setups like mine (will be). I'm still learning to race a stick and my times reflect, stock best: 14.2@102. As is now: 13.6@107.08 and 13.4@105.65. And my hopefull with the LT's: 12.8@109.

Will they affect highway mileage? Don't care about city!
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2006 GT, 5 Speed, 3.55, V3 non-cooled, Brenspeed 93 octane tune, Delete Plates, OBX LT's, O/R H
12.56 @ 108.72 NA
12.048 @ 116.71 1.885 60ft 8psi V3
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Old 5/21/08, 1:06 PM   #16
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What H or X pipe are you guys running with your OBX LT's??? I'm looking for a high flow catted version and don't want to run into fitment issues with the OBX headers.
thanks,
Mark
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Performance Mods: C&L Racer CAI + AMSOIL filter, w/ 93 octane dyno tune by Tillman Speed, Borla Stinger axleback, CHE K-member brace w/torque limiters
Exterior Mods: GT500 conversion., GT500 style rims, Kumho Ecsta ASX 255/50-17 tires, clear front turn signals, BSM GT500 slate gray stripes w/matching rocker stripe, G2 painted calipers, shortie antenna, Agent 47 mirrors painted
Interior Mods: SHR Satin "GT" cupholder bezel, MGW e-brake handle and power oultet plug, GT500 pedals, RedlineGoods black leather shift boot
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Old 5/21/08, 1:34 PM   #17
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What H or X pipe are you guys running with your OBX LT's??? I'm looking for a high flow catted version and don't want to run into fitment issues with the OBX headers.
thanks,
Mark
you set of headers should come with 2 different h-pipes. one looks like it has high flow cats but they are just small mufflers (though they do trick the emmissions guys )

I would say just get a couple high flow cats if you really want to run cats, and have them welded into one of the h-pipes that is supplied.
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Screaming Yellow Custom striped Pearl '05 GT, Magnacharger with C&L CAI, OBX stainless long tubes, Offroad H-pipe, Steeda Tri-Ax shifter, FRPP 4.10 gears, Black Bullit Wheels, Eibach Pro Kit, SCT Tuner, bamachips custom tune, BMR Adjustable Panhard Rod, CHE LCA relo brackets, adjustable upper control arm, CHE K member brace with full spherical torque limiters, Shelby CS6 Hood, SS Gen1 Front fascia, Agent 47 Ram-Air, Cervini Ducktail, Nitto NT555 tires.
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Old 5/21/08, 4:00 PM   #18
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You're telling me the headers already come with their own H pipe at that price??????!!!!!! SOLD!
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Performance Mods: C&L Racer CAI + AMSOIL filter, w/ 93 octane dyno tune by Tillman Speed, Borla Stinger axleback, CHE K-member brace w/torque limiters
Exterior Mods: GT500 conversion., GT500 style rims, Kumho Ecsta ASX 255/50-17 tires, clear front turn signals, BSM GT500 slate gray stripes w/matching rocker stripe, G2 painted calipers, shortie antenna, Agent 47 mirrors painted
Interior Mods: SHR Satin "GT" cupholder bezel, MGW e-brake handle and power oultet plug, GT500 pedals, RedlineGoods black leather shift boot
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Old 5/21/08, 4:59 PM   #19
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You're telling me the headers already come with their own H pipe at that price??????!!!!!! SOLD!
they come with two different h-pipes for that price.
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Screaming Yellow Custom striped Pearl '05 GT, Magnacharger with C&L CAI, OBX stainless long tubes, Offroad H-pipe, Steeda Tri-Ax shifter, FRPP 4.10 gears, Black Bullit Wheels, Eibach Pro Kit, SCT Tuner, bamachips custom tune, BMR Adjustable Panhard Rod, CHE LCA relo brackets, adjustable upper control arm, CHE K member brace with full spherical torque limiters, Shelby CS6 Hood, SS Gen1 Front fascia, Agent 47 Ram-Air, Cervini Ducktail, Nitto NT555 tires.
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Old 5/21/08, 5:00 PM   #20
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You're telling me the headers already come with their own H pipe at that price??????!!!!!! SOLD!

Hey Mark...NO you are wrong. The OBX come with TWO H-pipes!! You get a standard H-pipe set-up and an H-pipe setup with resonators in them. Here a link to a set getting ready to sell in 1 hour 9 min from now. You can see both of the H-pipes you get.

http://cgi.ebay.com/ebaymotors/OBX-0...spagenameZWDVW
Scott
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2005 Performance White GT Vert Parchment leather interior, side airbags, premium machined 17 inch wheels, shaker 500, IUP dash upgrade, automatic transmission. Ordered on 1/8/05 and arrived on 3/18/05

A bunch more mods than I'm allowed to post. :-) I hate limits!

Final Dyno #'s 315/311 on 2/15/08 at Brenspeeds
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