3 inch exhaust setups...center resonator/muffler and rear muffler

[F34R]

if you have a turbo, things like an X pipe are totally pointless. The pulses already merge at the turbo. And anyway a single pipe with a Y is just as effective, lighter, and cheaper.

I conclude that you have NFC, but I'm willing to help if you're willing to listen. ;)

I don't know when it comes to turbo apps. Never owned a turbo car. I am willing to listen, and the stuff is not being bought till summer. I have a full garage and welder at my destruction. So I can fab/build whatever I want.

Here is the issue, I don't have the funds to go from swap to turbo. So I bought some headers till I can afford to boost. So my plans were to fab a Y pipe to a single 3" then another Y to that single inlet magnaflow(14816) Then when I could afford it make another exhaust system. And it is cheap for me to do this. My Uncle owns a garage and I can get piping at cost and bend everything in house.

Want to move to PMs to not litter the thread?

[FredK]

I am willing to listen, and the stuff is not being bought till summer. I have a full garage and welder at my destruction. So I can fab/build whatever I want.

Cool.

Here is the issue, I don't have the funds to go from swap to turbo. So I bought some headers till I can afford to boost. So my plans were to fab a Y pipe to a single 3" then another Y to that single inlet magnaflow(14816)

OK, everything sounds good, until the last part of your exhaust. To connect a single 3" pipe to a 2.25" pipe, you'd just be introducing a flow restriction.

If you want to run dual tips, get a reasonably sized 5x11 muffler (example: Magnaflow 14589), and get single in, dual out aftermarket exhaust tips. They have nice and shiny ones that look expensive. You will most likely have to get a 2.25" inlet tips and chop off the 2.25" pipe, and carefully modify the remainder of the Y to accept a 3.0" OD exhaust pipe. Fitment will be tight with a 22" long muffler like a 14589, but it will be doable if you chop the muffler inlet and outlet a bit.

Another tip: If you plan on going turbo, and using a 3.0" turbo-back exhaust, you should place the header y-merge right behind the headers, and negotiate the transmission tunnel hump with 3.0" pipe. That way you won't have to buy two more 45° 3.0" bends later on, which aren't super expensive, but still cost some money especially in stainless.

[e30polak]

Nando, you're car is friggin quiet! :shock:

Anyway here was my 3" set-up:

3" > Monstrous 26" Accelarator Muffler > 3" > 3" Vibrant Street Power Muffler

http://www.youtube.com/watch?v=j4YUuLrjBrw

Not as nice as my 2.5" set-up with the Borla Pro-XS in the middle and Vibrant at the end.

http://www.youtube.com/watch?v=nS2RJCk_itY&feature=related

http://www.youtube.com/watch?v=r2H5YreLZqk&feature=related

The Vibrant made the exhaust loud, but it's my favorite sounding muffler hands down!

[F34R]

Cool.


OK, everything sounds good, until the last part of your exhaust. To connect a single 3" pipe to a 2.25" pipe, you'd just be introducing a flow restriction.

If you want to run dual tips, get a reasonably sized 5x11 muffler (example: Magnaflow 14589), and get single in, dual out aftermarket exhaust tips. They have nice and shiny ones that look expensive. You will most likely have to get a 2.25" inlet tips and chop off the 2.25" pipe, and carefully modify the remainder of the Y to accept a 3.0" OD exhaust pipe. Fitment will be tight with a 22" long muffler like a 14589, but it will be doable if you chop the muffler inlet and outlet a bit.

Another tip: If you plan on going turbo, and using a 3.0" turbo-back exhaust, you should place the header y-merge right behind the headers, and negotiate the transmission tunnel hump with 3.0" pipe. That way you won't have to buy two more 45° 3.0" bends later on, which aren't super expensive, but still cost some money especially in stainless.

I agree with you on the muffler I liked, it was just plans at the moment. I like the one you listed, but it has an offset bend. I was looking for a straight through. So I searched for a bit, results:

I will just buy this one:
(Part #11219)

http://www.summitracing.com/parts/MPE-11219/

It is 8"x2" smaller and cheaper(not polished) I am painting everything black.

Here is the one you listed to compare, everything is the same but the design:
(Part #14589)

http://www.summitracing.com/parts/MPE-14589/

[Jjona5]

Damn I wish I could get on youtube.

I plan on going with a SINGLE 3 inch exhaust. Thanks for all of the input.

[ak-]

I want to learn more on single straight-thru exhaust sizes for a stockish m20. Pro's and con's to sizing. I don't think I ever got a definite answer from reading/searching.

edit: nvm, I read the title again and realized I'm thread jacking.

[FredK]

I agree with you on the muffler I liked, it was just plans at the moment. I like the one you listed, but it has an offset bend.

Internally the 14589 has an angled pipe. It is still "straight through", however, as the pipe remains at the same size throughout the entire can, and is a straight shot between inlet and outlet.

It won't make a difference one way or the other; you might get slightly more clearance to the axle halfshaft by choosing an offset in muffler.

For better pricing on Magnaflow stuff, there are some Ebay vendors that have a "Best Offer" option. I got $20 off MSRP on my muffler with free shipping.

[nando]

I want to learn more on single straight-thru exhaust sizes for a stockish m20. Pro's and con's to sizing. I don't think I ever got a definite answer from reading/searching.

edit: nvm, I read the title again and realized I'm thread jacking.

2.5" is perfect for a somewhat stock m20

[F34R]

Internally the 14589 has an angled pipe. It is still "straight through", however, as the pipe remains at the same size throughout the entire can, and is a straight shot between inlet and outlet.

It won't make a difference one way or the other; you might get slightly more clearance to the axle halfshaft by choosing an offset in muffler.

For better pricing on Magnaflow stuff, there are some Ebay vendors that have a "Best Offer" option. I got $20 off MSRP on my muffler with free shipping.

I got a friend at Magnaflow, so I will get it super cheap from him. Thanks for the help man!

[tommyp]

Nando, you're car is friggin quiet! :shock:

Anyway here was my 3" set-up:

3" > Monstrous 26" Accelarator Muffler > 3" > 3" Vibrant Street Power Muffler

http://www.youtube.com/watch?v=j4YUuLrjBrw

Not as nice as my 2.5" set-up with the Borla Pro-XS in the middle and Vibrant at the end.

http://www.youtube.com/watch?v=nS2RJCk_itY&feature=related

http://www.youtube.com/watch?v=r2H5YreLZqk&feature=related

The Vibrant made the exhaust loud, but it's my favorite sounding muffler hands down!

Wow that 2.5 sounds awesome man. I have a single 3 inch with a vibrant resonator and I need to get something else. It's just a little too much for me. I might try and go a similar route with your 2.5.

[nando]

add more mufflers if yours is too loud, no need to redo the whole exhaust.

my exhaust is actually far quieter than that video lets on - 90% of that sound is intake. If I stick the stock airbox on the car it gets much quieter, it's more like a woosh of air than anything.

[tommyp]

I didn't even see the video you posted the first time I went trough this thread nando. I was very surprised at how quiet your car is. I didn't know a 3 inch could be that quiet. I have set off at least 3 car alarms just by starting my car next to other ones in a parking spot. Maybe I will try and get a muffler to throw on the back first and see how it sounds.

[nando]

try a borla on the end. I bet you'll be much happier.

I haven't had a car with loud exhaust since I was 19-21. I won't ever have one again, shit gets old. :p

[etxxz]

BORLA... :D

neither of my mufflers are especially long, but other than a rumble at idle, it's actually pretty quiet.

this..

i got one. flowmaster Y, straight, X1 pro borla, Hot sauce tips. Awesomeness.

I'm actually going back this week to the muffler shop. I want to change out the flanges for v-bands.. or sanitary with a grafoil gasket. What i have right now starts to leak after a month. my car sounds like a pickup-truck by now.

[nando]

oh yes, V-bands are a must. It makes removing the exhaust 99x easier.