Toxicxk23

So after many months of wanting to remove my mufflers, I finally got around to it. Local shop here that I've had exhaust work done with before made me a new axle back Y pipe. We opened the piping up to 2.5" from the stock 2.25 diameter. It absolutely sounds beast!

I noticed after though that my RPM's run a bit lower now. For instance, I used to cruise at 75 mph @ ~2700 RPM and now it is at about ~2200 RPM. Anyone with straight pipes experience this or know the reason?

I absolutely love how it sounds now. It drones about but I like it and I can still hold a convo in the car normally

aspeckt

the drone is really what i'm worried about

06350F

iTrader: (4)

The larger pipe diameter might have something to do with the lower rpm's. Do you have any clips or photos of the setup?

Toxicxk23

It doesn't bother me but to others it might. It's all about personal opinion though.

Could possibly be. I will get video clips and pics soon.

e46m3lol

iTrader: (2)

Do you have any pics of the exhaust system?

Toxicxk23

I don't but if I can get under the car, I'll try to take one. All it really is though is 2.5" piping starting from the hangers near the flange (I cut the stock exhaust from there to save the flange and hanger) that Y splits where the original split is. I would've liked the new Y split to be more linear instead of close to a 90* bend but space was pretty tight when considering the brake lines and things.

I reused the stock tips. I just filed the notches down inside so it would fit the larger piping.

06350F

iTrader: (4)

I removed my M2 axle back yesterday and did a semi custom unit in its place. Why did you want the larger pipe? I still don't understand that. The exhaust can only flow so much, increasing the pipe size on a stock motor (cam,blower,N2o,etc) would be the main reason to open up the diameter.

06350F

iTrader: (4)

Can you please post some photos of what you did?

Toxicxk23

Here's a side shot showing where the tips are sitting now. I reused the stock tips and have them extended out a little bit. I personally love where it sits. Not too out and not too in IMO. Other pic is the best undershot I can get right now. It's not the best Y split but it's a hell of a lot better than the stock Y split. I'll try to get a video soon I promise! I just keep forgetting.

*Don't know why it's sideways... it keeps rotating whenever I upload it. Sorry!

azfsprt

iTrader: (4)

Yes please post a video want to hear this puppy of yours!

NYKnick101

Larger exhaust piping have proven to create power on a number of cars. There is a chart floating around the internet that shows the optimum exhaust pipe size per engine size. Catback exhaust's have larger piping than stock and have had dyno proven results.

To the OP, can you post pics of it behind as well as an exhaust video? Do you still have a resonator or just straight pipe all the way through?

Toxicxk23

Yeah I'll try and remember to take a picture from behind tomorrow. I got rid of the resonator the first week I got the car lol so yeah straight all the way through except for the cats.

NYKnick101

to BLAZE_TYLR

http://www.magnaflow.com/wideopen/performdata.asp

It was a more in depth chart but you can get the idea from here

Toxicxk23

Picture from the back as promised. Looks like stock minus the mufflers (obviously lol)