I still have my cat. but iam running without a muffler, will this hurt my car or improve performance?

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305TBI(LO3)
K&N filter

 

it should improve it, hower ur low end torque might suffer because of less back pressure, but not enough to worry, what u loose in the low end u will gain top end. is ur cat gutted? or still working.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series Muffler added to Unkown CatBack, Ported Intake

http://www.geocities.com/david_angel_16

 

trust me when I say don't worry about back pressure when you have a cat. I've done everything under the sun to my cat and cat back. right now I have it set up so that I can have a 3 inch straight pipe by just unbolting the muffler (Timed about 30 seconds) Unless you have gears, posi, and some suspension parts you arent putting full power to the ground. anyways the tq lost is probably a whole 1 or 2 pounds, put you do pick up some horses.

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late model 91 rs, fully loaded, auto, t-tops, red leather, paint- gm red and yellow blend (light red), custom painted 16" Camaro rims
305 tbi flat base 14"x3" with K&N, hypertech chip, accel super stock plug wires, only use full synthetic oil and delco filter, 2 1/2" cat delete pipe, Edelbrock 3" cat-back
MTX sub and amp, Bose all around
vic_v8@yahoo.com
street kills: New v-6 stang, 96 v6 camaro, totally killed '86 SC Camaro (305), 91 z 28 with 305
15.854@87.57 (I think I could have it 15.5 with good tires and two more runs)
next month: rest of ultimate tbi

 

No my cat isn't gutted, it is only 3 months old. As soon as I get a dig cam I will post pics of my custom bent exaust with 18in. stright chrome tips. Thanks for replying , I thought I might be sending my rebuilt Eng. to an early grave.

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305TBI(LO3)
K&N filter