Exhaust sound with shorty headers
Thread Starter
Teching In
Joined: Jun 2004
Posts: 17
Likes: 0
From: Baltimore Md
Exhaust sound with shorty headers I have been through most of the columns on shorty headers. I know not to expect more than a 10 horse power gain, and maybe a little more with high flow cats. First question; What kind of sound change could I expect, because I love the LM sound as is. Is 15 to 20 horse power gain a reasonable assumption with the high flow cats an larger diameter Y pipe. I do have a 99 and understand that the stock manafolds dont flow as well as the 00-02 models, which is why I might go with the shorty headers. Don't want the longtubes because of the sound change. Let me know...The sound most important to me and a better look under the car......Let me know...Thanks
The sound with the shorties would probably stay around the same loudness level.. with the highflow cats you would remain rasp free also..
The sound wouldn't change all that much..
The sound wouldn't change all that much..
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
I am not sure but I don't know about seeing 15-20 horsepower. Again, I am not sure, but I think that if you are THAT worried about the sound you should try and listen to a longtube/cat/LM equipped car. A LOT of people really like the way the loudmouth sounds with cats, that seems to be the rasp killing necessity.
TECH Enthusiast
Joined: Jan 2004
Posts: 611
Likes: 0
From: Fairfield, CA
Mine got a little louder and more throaty. In everday driving you won't notice it, but WOT is great as far as sound and acceleration. I picked up over .2 in the 1/4 mile with my shorty/y-pipe/carsound cat setup. I have the TSP Rumbler exhaust and from what I hear, it is similar to the LM, just with a different muffler. I too have a 99 and don't listen to anyone telling you it's not worth it. It IS. You just won't get AS much gain as you would with LTs, but that obviously is not your priority. Hope this helps, you can PM if you have any other questions.
