I like the look of my hidden turn downs, but i think the car would be a lot cooler looking under inspection and sound better around the vehicle if they dumed out sideways and down. so they point 45 degrees downward, and 45 degrees outward. if anyone has something similar i would like to see pics and hear stories. thanks a lot.

 

I would think if they were turned outwards the exhaust would be a little more nosier inside the car. That maybe what you want.

 

my car is so damn noisy inside. i got edelbrock headers and 3 inch flowmaster cat back, but the turndows point almost straight down. so the car rumbles a crap load. i figure if they point down at the same angle, but also go outwards and little, the sound would bounce off the ground at an angle and come out the sides off the ground. i dno just an idea, i cant picture it being louder inside though.

 

According to David Vizard having the pipes point slightly inward is best to reduce noise. I have the SLP headers with dual cats and a Mufflex 3.5 inch catback with the 3.5 inch Magnaflow straight though muffler and my car is pretty quiet inside. My exhaust is tucked under and points down at a 45 degree angle.

 

i got the downward angle right, i just want the outward angle to be different. like a side exit, but less extreme.

 

Honestly I doubt it is going to make any difference. The only way to be sure is to just do it. Give it a try, what's the worse that could happen? You have to weld them back due to no liking the results.

In this case, at least the mod and possible fix are easy and very inexpensive. Good luck and let us know what happens.

Oh yeah, one side effect of this may be that your ground effects "could" get heat damage. Doubtful but possible depending on how close the pipe is.

 

well like i said i already got tucked in turndowns and they are heating up the back gfx a little bit. i imagine turning them to the side and putting em down a little more would make less heat. anyhow, i only have a crappy stick welder here, but if my teacher lets me bring the car in, i can do it there with a mig. i might need a small amount of piping to make the turn.

 

First nice ride. Did you start with a different muffler on your mufflex cat back ? If so, why ? I am deliberating between the Flow and the SPintech they have, now you throw in a Magnaflow ?
Choices, choices. I am going with the 1 .75 SLP headers w/o air and a single gutted cat, possibly no cat. I know mufflers will make it without the cat. Have seen them on here. Thx for the info in advance. My '89 bright red GTA has 9k miles on her and yours looks to be in similiar condition. Gotta love it. Also what was your thought process onyour choice on single or dual outlets ?

 

When I order the Mufflex 3.5" catback the only choices I had were the Spintech or Flowmaster. The Flowmaster was out because I'm looking for performance. So I ordered it with the Spintech.

I just did not like the design of the Spintech. Meanwhile I discovered the Hooker Aerochamber which appeared to be a better muffler. It was not exactly straight through. So when I installed it on the car when I had the Mufflex catback installed. During this time I found out that Magnaflow was going to make a 3.5" muffler of their typical straight through design. So I ordered it as that was what I was looking for in the first place.

I never took the car to the track with the Aerochamber installed. Also the Aerochamber made a little more noise than I liked. Then the Magaflow showed up. Right from the get go this was the muffler for me. It is of the straight through design and was quiet. A lot more quiet than the Aerochamber. I ran the times in my signature with the Magnaflow.

The single in single out is the best design for unrestricted flow. I also think my car looks better/cleaner without the exhaust tips. Also hides that big exhaust pipe. Hehehe.

Regarding cats, two is best from a performance stand point. I think you are better off with a straight pipe versus a gutted cat. Also running the car without a cat will make it louder.

Mine is just comming up on 70,000 miles and is fully optioned including T-Tops. I'm the original owner and specifed the dual cat option. Heck you car with 9,000 miles is just barely broken in.

 

70k, she looks great from what I can see, so you went through three mufflers ? I hope you were able to unload the extra ones.
I agree on the single and out theory as opposed to the crossflow design. Also I agree with you on the no tips showing out the back. I didn't have my '89 from the get-go or I probably would have gotten the two cat option. The car has EVERYTHING ELSE, I have had three of these and when I say everything I do know. I hope you have aftermarket high flows cats on there, I am betting you do. Back when our cars were built cats flowed like crap so they had two as an option. Every dyno test I have seen showed
little to no less with ONE high flow cat versus NO cat so I do not believe I would be at any disadvantage with a single high flow or even a gutted version even though some feel a gutted cat can affect hp. IMO I have less weight without the twin cats and more room to work underneath. I am happy with it even though like you at the time I would have popped for it in 1989.

Magnaflow, can you describe your new system compared to maybe the factory exhaust. I had a feeling the FLowmaster race muffler would be unbearably loud with a 3.5 exhaust pipe. Could you please describe the tonal qualites and just how loud it is at cruisng speeds. Thx for your help.

 

Right now I have the Carsound ceramic substrate cats that flow 400 cfm. Magnaflow is comming out with metalic substrate cats that flow 600 cfm. I will install those on my car. The factory exhaust system has all been replaced. SLP Tri-Y headers, 2 1/2 inch pipes to the dual cats, 2 1/2 inch pipes to the Y-Pipe and then 3.5 inch to the Magnaflow 12909 muffler and of course the 3 1/2 inch tail pipe.

I will be going to 1 3/4" custom headers with a 3" collector and 3" pipes to the 3" cats. Then 3" to the Y-Pipe and 3.5" on back as described above. Should be free flowing with no back pressure.

The exhaust sound is pretty much on the factory level cruising down the highway and around town. I believe it to be louder though at wide open throttle. It has a good throaty roar to it. No problem carrying on a conversation or listening to the radio.

 

oh well, maybe ill start another post again later...this turned into a muffler selection thread.

 

Why don't you start a thread asking if someone has their tips turned up ?

ANother Muffler selection thread would be useful, I am not sure anyone would call the title of this thread useful ? Turndowns will always be down or slightly outward depending on your personal preference. I think we all knew this. Quit your bitchin'.

 

what the hell?! im not trying to make a useful thread, im trying to ask a question and get an answer. and i think your dumb *** didnt even understand the question. i meant outward as in towards the tires...not towards the back bumper...like sideways, not vertically. if you want another muffler selection thread go start one, i just wanted an answer to my question. do you even understand the rules and purposes to this forum? sorry for being rude about it, but you were rude first, and im having a terrible day.

 

I completely understood your question and do you completely understand how dumb a question it was ?

ALL I did was ask a question of one of the posters in this thread and you got pissy about it. If we started a thread for every little question or dumb one in your case this site would be out of bandwidth. I would have NEVER said a thing until you decided
to get all pissy about it, then what the hell I decided to tell it like it is. Don't like it, next time bite your tongue.

 

no, you were rude first. all i said was oh it got turned around, maybe ill try again later. and you responded by calling me a retard. the reason for this board is so questions can be answered. and if you even took a minute to go into the archives and search, you would find a billion muffler selection threads. how the hell is this a dumb question, im asking if you turn the tips out a little, would interior noise go down and exterior noise go up. and you got into a conversation. you say you tell it like it is, and then you lied about how it was, way to go.