biglg

Hi,
I have an 89 mustang gt convertible. It is basically stock. It does have a CAI. I dont plan to do anythign drastic to the performance right now. Interior & Exterior to perfection first.

Anyways, what will straight pipes do to the performance of my car, low end? The exhaust is stock 2.25".

I have had 6 new dodge rams in the past 4 years. One was the 5.9 liter, one 4.7, and the rest were hemi's. I tried straight pipes on all different trucks. The 5.7 it worked, sounded good. The 4.7 didnt sound good, and the hemi lost low end. The hemi can lose low end with too little back pressure. I honestly dont know much about the need for back pressure, or lack there of on my mustang.

On this old mustang, stock car, stock exhaust will I lose low end with straight pipes? Does anyone have a sound clip? I had straights on my last 4.6L Mustang, it sounded and ran fine. Please help with sound clips, and testimonials. Thanks.

Black Snake

When you mean straight pipes your saying no Cats and Mufflers right?

If yes, then No it wont sound good. It will sound like ****.

88scgt

no straight pipes, no cats but definetly mufflers

91stang

it'll be louder and deeper... you won't loose performance like torque unless you have a really unrestricted muffler.

also i noticed a increase in mpg

biglg

Sorry,
I should have been more clear. I am saying use 100% of the stock exhaust, except cut the mufflers out and put in a straight pipe for each one? What would that sound like, how woudl that affect performance. I am not looking for perfomance gains, just dont want to lose low end.

g2_5point0

You'll immediately lose low end doing this. Mufflers create backpressure. Just cut out the stock mufflers and replace them with better mufflers for sound, you even might get some performance upgrades despite not wanting any.

I know someone on this forum was able to remove mufflers and still retain the same low end numbers, but then again, his pipes were no longer straight =p

Vertastang

buy some Mufflers!! ive heard on with just straight pipe like your talking about, it snaps cracks unless thats what u want i wouldnt do it! just my .02's

gspfunk

You'd be better of getting mufflers and an offroad H....it'll sound better and run better.

JD1969

Did we suddenly time warp back to 1967? Todays quality high flow mufflers will not rob you of any power and will make your car sound better.

biglg

I never mentioned that mufflers would cause low end power loss. I was asking about straight pipes.

Also, I dont want straight pipes for any reason accept on my 96 4.6L it sounded good. No cackle, no pops. It is also a lot cheaper than the over price mufflers, which most are straight through anyways. So I wanted to know why not just put in a piece of pipe, rather than pay 100 each for a straight through muffler?