2" is a bit on the small side. Needs to be 2.5" ideally, will cost you spool time and HP.

 

Looking forward to seeing your exhaust.
I made a side exit for one of the r5's I had, sounded like a tractor! Only had a midbox tho.
Alex you just going single rear box, no mid?

 

My gt had 2.5 inch downpipe to a mid box and a silencer. It wasnt too loud to be fair to it but i do like them loud. My s14 was 3 inch straight through that was loud but good loud. Needed a bung for track use

 

2" is a bit on the small side. Needs to be 2.5" ideally, will cost you spool time and HP.

Really, my DP had a 2 inch flange at the base so went off that, would be 2 inch and straight through to a can at the back???

I was under the impression of keeping the gases moving faster.

 

Looking forward to seeing your exhaust.
I made a side exit for one of the r5's I had, sounded like a tractor! Only had a midbox tho.
Alex you just going single rear box, no mid?

Cheers.

I was thinking of going side exit, then realised I would have to go around the chasis rails and decided it would be to close.

Just single rear box and a pipe.

 

Bigger is better with turbo exhausts. I like ak's old side exit exhaust.
I'm going 2.5" with manual exhaust flap and single rear box, and if I can find one cheap enough a mid box.

 

Ruddy fuck, better send all this shit back then

Why not just go 3inch then?

 

I had 2.5" stuff, and 3" can be trickier routing around things.
And I'm doing mine on super tight budget so it's been whatever I can get for free/cheap

 

2.5 inch it is then.

 

I think I'll have to ditch my current 2.25" system. I've got a 2.5" DP and decat.

 

I sold my mx5parts system as knew it would be a restriction.
Between us we should really do a DIY guide to all this.

 

I sold my mx5parts system as knew it would be a restriction.
Between us we should really do a DIY guide to all this.

I will do something for this exhausts when I make it. Photos and links to parts, that kind of thing.

 

I'll make my own exhaust if I go to 2.5", my welding isn't that bad these days...

 

Never welded stainless but I'm going to be making my exhaust soon.
Oh and as an eye opener, fm 3" full system would cost about a grand!
http://flyinmiata.com/index.php?deptid=4541&parentid=0&stocknumber=06-39200

 

I've welded stainless with mild wire, no different to mild. Would look nicer if it was tig'd but you'd never see it under the car...

This is mild flexi to stainless manifold

Stainless to stainless

 

Nice Work, im making mine out of mild steel. Just phoned up to change my Order to 2.5 inch, but it had already been dispatched.

Bloody hell a grand, mines costing me £150 to make. Probably another £50 to do it in stainless.

 

My race car has a grp a mild exhaust on it, paint the exhaust with BBQ paint to protect it.

 

Iv gone for aluminiumised steel, I was going to do as you did and weld stainless with normal wire and gas. But then thought if the welds are going to rust, I might as well just do it in a coated mild steel.

I do have a TIG welder here, which is my little brothers but it's bloody 3 phase.

 

You'll need to paint the welds as they'll still rust.

Have a look at the Ashley systems

 

Yeah I know, couldn't justify doing that on a stainless system.

 

I bought some stainless wire and using same gas.

 

I bought some stainless wire and using same gas.

Nice, stick some photos up when your doing it.

 

I need to practice more with my welder my welds are getting strong but look a mess. Only used it twice need more scrap. Il love to make my own exhaust. Side exit is a no go i forgot the chasis rails stuck out so low id loose clearance. Out the back or out the side of rear bumper maybe

 

Yeah im no pro either, just bought a MIG when I had a 1983 Mini as it was the logical thing to do. Good skill to have when you need to make a bracket up, or when you look at one of your sills.

Just sent all my wrong sized exhaust metal work back, better part of £30 at the post office :censor:

 

Rip off bastards