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well its because my friends always ****ing make fun of my car because it stops at 110..when thier cars exeed 120MPH(Nissan Altima,Volvo 850 GLT....it pisses me off...i have pretty ****ty tires($69.99 each) sigma shadows........ so i doubt they will be safe beyond 120...Iam planning on replacing...

how much of a horsepower gain can you get from new headers then?? 5-10???

Headers replace the stock restrictive headers and open up your exhuast more...you can expect a louder meaner sound as well as high performance gains..(up to 30hp)...

is there any chip/software that i can buy for my 98 Mustang v6...that will raise the speed limter??...Please respond ASAP Links would be apprecciated