rotarygod

iTrader: (1)

2 1/2" after the collector. 2 1/4" is still too small. 2 1/4" max through each muffler after the Y-pipe is fine.

DrifterFD3S

go to a muffler shop and get them to weld it in with pieces of steel about 1 1/2 inch away from the floor pan. shouldnt cost all that much, and itll stop the knocking altogether

Cory Simpson

I don't have to worry about the welding we have a wire and a stick welder, and even though I can't weld worth crap my brother and step dad are good welders. I have all the tools I need to do it I just don't have hte muffler and all the piping.

Jimmy325i

If that RPM muffler is rattling, it's due to the stuffing being blown out of it. I thought for sure I had burned out the perf core as well, but when I looked inside it was all intact. There was just nothing on the other side of the sheet and light passed straight through the muffler.

Search for my thread about the Edelbrock RPM muffler if you want to see pics of what these things look like when used as a front muffler. It ain't pretty!

mazdaspeed7

Justins rattlign keeps getting worse. Its almost time for #3...

Jimmy325i

Mine sang like a fat lady in opera @ 4K. The flat surfaces of these mufflers resonate very efficiently when they've been freed of their stuffing. Seriously loud and unbearably annoying to say the least. I also can't imagine these things flow for **** when the packing has been burned out. Lots of turbulence in there.

Crawl under the car and tap the muffler if you think it has puked its guts. She'll sound like an empty coffee can.

RX-7Impreza

Cory,

that was me at Johns house. I think i remember who you were, did i introduce myself to you at some point???

i think i will go take the schools camera and shoot some pics

Justin

Cory Simpson

I don't remember that many people from his house. I'm sure you did introduce your self, I might be set apart in someones mind because I asked a couple of people what was wrong with my car, and most everyone said it was leaky fuel injectors. But my memory is about as long as a ugo. Yeah hopfully I will get enough money out of the cans that are on my car that I can buy a spintech muffler, and the headers and flanges I ordered should be at my door step by tommorow. So maybe I can start putting these things together.

RX-7Impreza

i am ditching my current set-up and going with a slightly different muffler and set-up, i ordered the stuff. until i get it on the car ill just tease everybody and say that it has the weight and power of a single collected with whatever advantages a dual has.

aurally pleasing i hope and i think the new muffler may handle stuff a little better

plus it leaves the door open for a bunch of different set-ups.

ill get pics of the current set-up thursday morning at school

Justin

RX-7Impreza

i have pics and i will post them soon

Justin

RX-7Impreza

pics are up here https://www.rx7club.com/forum/showth...44#post1711844

Justin