GTO Bolt On List

Here Is A List of Bolt On Modifications You Can Do To Your Pontiac GTO to increase Horsepower & Torque. The RWHP Numbers That Are Given Are What People Usually See At The Dyno. Custom Tuning Will Help Some Bolt On Modifications Maximize Their Full RWHP Potential. Results WILL Vary. http://ls1gto.com/forums/images/smilies/burnout.gif ( Thanks LS1PontiacGTO)

NOTE: 2004 GTO Output With Full Bolt On's
RWHP ~ 340-360
RWTQ ~ 345-370

The 05's Results Are Yet To Be Seen


* = Will Also Work With The LS2 2005 + GTO http://ls1gto.com/forums/images/smilies/biggrin.gif

Cold Air Intake

RWHP Gain ~ 5-15
RWTQ Gain ~ 10-15

Average Cost - $180 - 370

• LPE*
• K&N*
• Speed Inc.
• MPD
• Gravanna*
• AEM*
• New Era*
• JHP/HSV MAF Pipe
• CS Performance Ltd MAF Pipe

Long Tube Headers

RWHP Gain ~ 25-35
RWTQ Gain ~ 20-30

Average Cost - $1100 - 1300

• Kooks*
• SLP*
• Stainless Works*
• DynaTech*

Mid Length Headers

RWHP Gain ~ 15-20
RWTQ Gain ~ 10-20

Average Cost - $750 - 900

• SLP

Shortie Headers

RWHP Gain ~ 10
RWTQ Gain ~ 10

Average Cost - $560 - 735

• JBA*

Cat-Back Exhaust

RWHP Gain ~ 5-15
RWTQ Gain ~ 5-15

Average Cost - $500 - 910

• B&B
• Borla
• Corsa
• Flowmaster
• Stainless Works*
• SLP*
• Magnaflow*

Intake Manifold

RWHP Gain ~ 5-15
RWTQ Gain ~ 5-15

Average Cost - $750 - 1000

• FAST LSX*
• Weiand
• NX
• Holley
• Edelbrock
• BBK

Custom Tune

RWHP Gain ~ 15-25
RWTQ Gain ~ 15-30

Average Cost - $150 - 500

• LS1 Edit
• LS2 Edit*
• Predator Power Programmer*
• Superchips Power Programmer
• Hp Tuners*
• EFI Live

Electric Water Pump

RWHP Gain ~ 10-15
RWTQ Gain ~ 5-10

Average Cost - $550 - 600

• Meziere

Thermostat

RWHP Gain ~ 2
RWTQ Gain ~ 2


Average Cost - $10 - 40

• SLP*
• LPE*

Ported & Polished Throttle Body

RWHP Gain ~ 5-12
RWTQ Gain ~ 5

Average Cost - $100 - 500

• SLP
• MTI
• FAST
• NX
• LPE
• Nick Williams
• Shaner
• Bo White
• Jantzer

Throttle Body Coolent Bypass

RWHP Gain ~ 2-3
RWTQ Gain ~ 2-5

Average Cost - $15

• BMR*

Oil Catch Can

RWHP Gain ~ 2-6
RWTQ Gain ~ 2-6

Average Cost - $90 - 130

• AMW*
• CS Performance Ltd*

Underdrive Crank Pulley/Alternator Pulley

RWHP Gain ~ 10-15
RWTQ Gain ~ 10-15

Average Cost - $180 - 220

• ASP*
• SLP*
• March*

What a great list! Thank you for posting it! :)

good info

Great post! Let's keep building info like this up around here.

thanks for the info mate

thanks for the info that stuffs awesome!

You can also add some OTRCAI(over the radiator cold air induction) from Oz. Protorque and G&D seem to be the most popular with gains of .3 and 2-3mph being the norm.

Also TB bypass is free for the '04. Just reroute the lines. The '05 doesn't have coolant flowing in it so you don't even have to worry about it.

The catch can price from AMW doubled! 180 or so for the can. Work of art but shouldn't have doubled in price as of 8/1 or thereabouts.