zoltan944

i think the middle section would? and i could RMB the end which would help?
what about the headers?

heinrich

You'd have to make the battery box smaller, otherwise it would be fine.

Imo000

The cat back off an '86.5 will not fit the '85. The battery box in the '86.5 is smaller than the '85-'86. This is so that the passanger side pipe can wrap around the battery box. If you try installing this on an '85-'86 the battery box will be in the way.

The headers and the cats are the same as an '85. The cats are actually the same for all the 32V engines (early and late). If you want an RMB, just go to your local muffler shop and they can make one easily and it will not cost a lot of $$$.

Jim bailey - 928 International

Your battery box is in the way... not enough room for the passenger side pipe to cross over behind the gearbox. You already have dual exhaust just side by side. They both use the same cat convertor

Ketchmi

A pipe can be custom made to clear the battery box, just the small problem of relocating fuel lines, fabricating a heat shield that will work with an auto trans and adding attaching points for the whole mess. I have done one and it worked fine but wasn't cheap or very pretty.

Jim bailey - 928 International

Reminds me of a shop owner I knew who used to say "We can fix anything.....no matter how much it costs "

zoltan944

okay, i guess the real question was if the headers made any sense. someone is selling their complete exhasut from a 86.5 w/ rmb, so i was thinking about it. But since everything else is good ill just get an X-pipe and do my own RMB...
Jim, why don't you guys offer an X-pipe? saving shipping is awesome! my order i placed today was $1.80!!!!! LOL! i couldn't drive to the freeway for that price!

Jim bailey - 928 International

Thanks for pointing out the shipping we will correct that before it ships ! We decided NOT to sell X pipes primarily because Mr Ott was doing a fine job then two others entered the market and it seemed the world did not NEED another X-pipe. The exhaust manifolds 85 32 valve and 86 or 86.5 are the same.

Imo000

Well in that case, what you can do is to install an X-pipe. Then keep the original cat back and have the real muffler cut off and replaced by a custom made RMB. This way, you don't have to fabricate an entire rear section, just the RMB. A custom made RMB should cost the same of less than a 928Int. S4 RMB.

Jim bailey - 928 International

Imo .... That would be just about as loud as straight pipes no muffler at all since the center resonator is a very small straightthrough two into two unit. It would be really loud !

Imo000

I know! Mine is almsot like that. Instead of an RMB I have a muffler cut out. It soudns nice and semi quiet as long as you keep it under 3000rpms. After that.... it soudns like....... well, like a straight throught system (I like it).

zoltan944

Imo000, agreed! im gonna pick out some nice rolled slash cut pipes!
Jim, i eat chinese food at the same place 1-2 times a week. The owner is a nice guy, and its a 'mom and pop shop'... Every now and then a new person up front charges me less for my combo, casue they get confused with my order, and i politly correct them. I only take discounts when they are given not because of error

Scott M.

FWIW,

I have an 86.5 exhaust on my 84 5 spd. The pass. pipe clears the battery box nicely, the problem lies in the area of the rear crossmember. There are no provisions to attach a pipe to the early crossmembers on that pass. side. We had to fabricate our own mount.
On the 85 there would be little gain. On the 84, it was a hugh freakin' improvment, especially with an RMB and a cat bypass pipe. Add the tubular (totally dude) 85/6 ex. manifolds and rumble.

Imo000

You could have avoided the hassle with the cross member if you used an '85-'86 exhaust system instead of the '86.5. The '85-'86 system is also a dual just like the '86.5 except, after leaving the cats, both pipes run long the driver side.

If you do a search you'll find a tread only a couple months old that has a pic of both '85-'86 and the '86.5 exhaust system sitting side by side. The '85-'86 system is basically a bolt on, while the '86.5 requires some modifications.

Scott M.

I could have, but you gotta go with what you got. And now I have a factory RMB w/o hacking or welding.

If you need pictures, I have 5 different exhaust systems lying here for your perusal.