I work for an engineering firm who produces an array of stainless steel products.

Therefore I have access to stainless piping, CNC machines, stainless sheets, etc..

I talked to the shop manager here and he said (based on the measurements I guesstimated) that I could have a 3'' mid pipe made here for like $50 or less (using leftover pieces).

Are there any resources for mid-pipe dimensions on the RA? I'm going to measure it up myself but it would be nice to get started with some existing (if possible).

Any help would be great!

 

ps: I didn't know EvolutionM was an RPG hahaha















<<<<<<<

 

I just leveled up.

I don't have the midpipe specs on hand, but I do have a question. What are you going to be using for the muffler section? More specifically, are you going to keep the OEM rear flange location (just upstream of the muffler)? If so, the pipe diameter at that flange will cause it to become a restriction if you increase the diameter of the midpipe. Most exhaust companies delete this flange altogether.
Just curious to find out what you have in mind

 

Haha...I got this notification saying I LEVELED UP!! yesss....

To be honest, I haven't looked at the whole thing yet. I need to get under the car and figure out what I'm going to do.

I basically can do whatever I want and it's going to cost me less than $100 (with welding labour, CNC parts, pipe bending etc...). Most mid-pipes run between $350-$500 so I'm pretty happy.

I'm ultimately going to try and something as close to the muffler as possible in 3''. Sadly, I can't risk also changing the muffler section because cops here are really bad with loud exhausts. I figure now with ALMOST having a TBE, it will be much louder to begin with.

Any suggestions? If you can find specs/lengths/sizes I'd be able to draw up some fabrication drawings and get it going.

 

I just re-read your post and I think I have a better idea of what you mean....

I'm making a piece to replace the entire piping (mid-pipe right after the cat + the section that has a small bend that goes into the muffler). Similar to the HKS center pipe (see link below) but mine will be all 3''.

 

http://www.autocityimports.com/2009-...pe-p-8335.html

 

With respect to cops/noise, can't you just add resonators to help reduce volume?

 

You could weld a vibrant resonator into the midpipe to cut down on sound. Then, just run dual mufflers downstream from a Y-pipe. Vibrant makes all the components you need, even exhaust tips. Shouldn't be much louder than stock if you do it right. For midpipe dimensions, I'd need to get my car up on a lift and measure, but that's only half the battle.

You'll also need to take into account that the new pipe will need to be adjusted to clear the rear diff and nearby components, due to it's larger diameter. The OEM midpipe cuts down to about 2 1/4 inch at this point. Also, you need to take into account the fact that the engine rocks under load, and this moves the exhaust system. Then, you need to adjust hanger lengths to make sure the exhaust doesn't hang too low. Magnaflow uses 3 separate pieces, connected via a slip fit with clamp design so that you can adjust the exhaust to get it right. Once you've completed your midpipe, you still need to address the OEM muffler. I personally don't think you'll see much of a gain just doing the midpipe, however. The restrictions in the OEM exhaust will be at the cat and at the muffler, not the midpipe. Changing this will most likely make little difference.

You'll find yourself doing several mock-ups before you get it right. For these reasons, I don't think using OEM specs for lengths and angles will be much help to you.

To play devil's advocate, you can pick up a Magnaflow, DC or similar exhaust for ~$450. Fabricating the exhaust with tips and mufflers will run you nearly the same amount, before the cost of the resonator. If a manufacturer's exhaust is too loud, you can add a resonator to it.

 

Thanks man. That is helpful (for me at least). I just purchased a Cobb DP and high flow cat. I have yet to buy the catback, but am thinking about purchasing a HKS. Unfortunately, the entire set up will cost nearly 2 grand here in Canada. I just have a feeling that it will be too loud for my liking (I don't want the added attention). So in that case, what are my options for reducing sound...just resonators?

 

A Vibrant resonator should do the trick, ultra quiet flow goes for ~$140, while the louder bottle style goes between $80-$110. The OEM piece has a resonator so you shouldn't have a clearance issue if you install it in the same spot. I'm curious as to why the whole setup will cost you 2 grand, as I'm also from Canada but was able to do a HFC + CBE for under a grand, taxes in.