3rd gen exhaust manifolds - what's the difference?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Wed Oct 28, 2015 6:53 am

No. But I happen to have an 89 and 91 lude at the barn

so I will have a look as best I can (can't get under the 89 atm - it's too low!)

fefelarue · Post by **fefelarue** » Wed Oct 28, 2015 7:20 pm

You legend! Thank you

fefelarue · Post by **fefelarue** » Tue Nov 03, 2015 6:44 pm

any news on this ol' buddy?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Tue Nov 03, 2015 7:38 pm

Tried at the weekend but couldn't get a good look, cause I was running out of time and it was a bit dark. I'll try again next weekend...

fefelarue · Post by **fefelarue** » Wed Nov 04, 2015 12:05 pm

Many thanks

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sun Nov 15, 2015 4:31 pm

Ok @fefelarue I've been under the 91 facelift B20A7 today, with pre-facelift downpipe in hand and... I can't see any difference. Length, flanges etc all look the same. The only difference I could spot was that the facelift had built-in heat shields on the pipes in the front section, whereas the pre-face didn't.
That's similar to the difference between jdm and ukdm 4g (jdm has built in heat shields, ukdm doesn't) and the heat shields make no difference to fitment. (It might also just be because the facelift I have is an oem downpipe, whereas the pre-face is an aftermarket replacement I think - just a big standard cheap thing, nothing performance...).

I also can't see any difference between the manifolds, but to caveat that, I haven't removed the manifold heat shields on either, to check 100%. However, I really can't see what would be different in order to prevent fitment.

Only thing I would suggest you should still check, is whether the US pre-face didn't have cats, but the facelift did? If so, that might make a difference to the rear flange. Other than that... I would suggest nothing to point to any difference.

FWIW, some pics of the facelift downpipe setup, below;

fefelarue · Post by **fefelarue** » Sun Nov 15, 2015 6:34 pm

Awesome, thanks so much for doing this

I'll just order it and hope for the best! If it doesn't fit I'm sure I won't have too much trouble flogging it on here.

Thanks again buddy