I'm finally getting around to upgrading the exhaust system on my nb and have some questions.

I am sticking with my 2.5in begi dp, but am having a friend at an exhaust shop build the rest of the system for me. The cat is going bye-bye as well as the resonator, and I am planning on getting rid of the lower half of the begi dp that contains the flexpipe and flange and running a slip fit all the way back to the muffler instead.

I want a quiet setup because with the 4.30 rear end I spend a lot of time above 4k rpm in cruise and I don't want to go deaf. Will I be happy with a
2.5in system back to a large magnaflow muffler or am I leaving power on the table without going 3in?

Turbo is a 2854 and I run 15psi.

Also, what is the largest magnaflow that will fit under my nb without modification?

 

3" or you're leaving power on table.
5x11x22 iirc

 

5x11x22 or die by fire.

 

Should I go right from the 2.5in dp to 3in or what? Also who's got he cheapest price on magnaflows?

 

yes. either have the cat step up to a 3" outlet, or make the exhaust bolt up to the 2.5" DP and step up to 3" the rest of the way.

performancepeddler.com will have the best prices if you email them for a better price (see site)

but all vendors will sell mangaflow mufflers are exactly the same price advertised.

 

4" exhaust or bust

 

4"? I may need you to fly to Detroit so I can take advantage of your skills with a sawzall.

Ok, so have him come off the dp with a short taper up to 3", back to a 5x11x22" magnaflow with a 3" opening, profit?

Ordering muffler tonight, what are you gays using for a tailpipe?

Thanks

 

we use a pipe for a tail pipe

 

Ok, I ordered the 5x11x22 magnaflow last night. Best deal I found was $101 shipped off amazon, it should be here early next week.

 

My muffler came in the mail today. I ordered the magnaflow #12579 with 3" in/out (5x11x22). It's freakin huge!

I thought I was getting a straight through design but it actually forks off into two chambers and then back to one at the exit. I hope I got the right one?

My car is going under the knife Wednesday morning, I'll update when I get her home.

 

Post pics. I don't think you got the right one. The right one is straight through

 

What????

My magnaflow is straight all the way. I think you got the wrong one.

 

What part number is yours?


1000th post!

 

if its chambered, its weaksous and you should return it

 

that's not right.

here's mine" straight through: [img]www.boostedmiata.com/gallery2/d/11084-2/parts+004.jpg[/img]

 

ololoollololololloolololollo brainy can't post pics.

edit: ahahghehwhahwhas your ***** broken.

 

Haa haa! <Nelson's voice>

 

Huh, no boostedmiata.com stuff works for me, "Problem loading page".

 

pretty sure it's 12578. lol. missed it by a digit sucka!

http://www.magnaflow.com/02product/d...rtnumber=12578
http://www.magnaflow.com/02product/d...rtnumber=12579

note the core size. the 12579 has a "dual 2.5"
12578 is 3". you're welcome!

 

was on the mobile site, didn't parse my img tags... weird.