How much horsepower will an exhaust add

65

Asked by Jul 20, 2012 at 03:39 AM about the 2000 Pontiac Grand Prix GT

Question type: Car Customization

I have a 2000 grand prix with the 3.8 in it, ive added a magnaflow cat and then dual SLP flowthrough mufflers, plus high output coil spark plugs and msd wires. About how much hp do you think ive added from the original 205hp

Also i have a 91 k1500 silverado that has an aftermarket throttle body, cold air intake, perfomance headers and cat, and glass pack muffler, also msd wired and high output coil. stock was 210hp.

3 Answers

242,255

By opening up the exhaust you can free up some HP, maybe 5-10HP max. Throttle response is probably better as you noticed, but negligable in the power department. Only real way to know is put your car on a Dyno. The quoted HP of a car is with the engine run on a stand, so the HP has to go through a drivetrain, so you lose some there. 20% less HP than stated on avg. with an automatic. Less for a manual.

7,335

no tuning done on either? both probably gained anywhere from 5-10 hp.

yup i would say around 5 hp.

Your Answer

Add photo

Related Questions

  • How much horsepower will an exhaust add 3 answers

    I have a 2000 grand prix with the 3.8 in it, ive added a magnaflow cat and then dual SLP flowthrough mufflers, plus high output coil spark plugs and msd wires. About how much hp do you think ive added...

    2000 Pontiac Grand Prix GT

    -

    Car Customization

  • horsepower/color 2 answers

    where can i find info on getting the most out of my supercharged 3800?the color of this car is copper with silver stripes. was this an option?

    1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Car Customization

  • EXHAUST 2 answers

    wondering if anyone has info on the best sounding exhaust for my gtp?

    Pontiac Grand Prix

    -

    Car Customization

  • how much difference to a 1998 4 answers

    I have A 1998 Grand Prix GTP, which was in a accident. A friend of mine has a 1993 Grand Prix. How much difference between the two cars? Can I take parts from my 1998 and use them on the 1993 ( Motor ...

    1993 Pontiac Grand Prix 2 Dr SE Coupe

    -

    Car Customization

  • Horsepower needed 6 answers

    I wanna put more horsepoer in my car but not sure on what i can right now i currently have a 3.1 v6 in my 1995 pontiac grand prix but changing it to a 3.4 l v6 what can i max out on horsepower with ...

    1995 Pontiac Grand Prix 2 Dr SE Coupe

    -

    Car Customization

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,863 nationwide Grand Prix listings starting at $1,600.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,270
#2 Tom Demyan
Tom Demyan
Reputation 2,870
#3 munron
munron
Reputation 2,210
View All

Related Models For Sale

Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Pontiac Bonneville
4 Great Deals out of 511 listings starting at $1,799
Used Pontiac Grand Am
1,183 listings starting at $1,599
Used Chevrolet Monte Carlo
20 Great Deals out of 1,419 listings starting at $1,995
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999
Used Chevrolet Malibu
1,062 Great Deals out of 77,909 listings starting at $1,500
Used Chevrolet Camaro
242 Great Deals out of 31,193 listings starting at $369
Used Honda Accord
946 Great Deals out of 77,735 listings starting at $899
Used Pontiac Firebird
4 Great Deals out of 768 listings starting at $1,791
Used Nissan Maxima
323 Great Deals out of 24,380 listings starting at $999
Used Nissan Altima
1,156 Great Deals out of 79,666 listings starting at $500

Used Cars For Sale

2006 Pontiac Grand Prix GT For Sale
4 Great Deals out of 89 listings starting at $1,600
2005 Pontiac Grand Prix GT For Sale
114 listings starting at $1,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.