UK BB1 middle exhaust query

Luder · Post by **Luder** » Sun Sep 01, 2024 2:15 pm

Hello

I was just wondering if anyone knows wether a UK Bb3 2.0l or UK bb2 2.3l center section is the same as a UK bb1 2.2l?

Thanks

Post by **vanzep** » Mon Sep 02, 2024 1:04 pm

Here is a list of part numbers for 4th gen exhaust parts:
kb/viewarticle?a=7

looks like mid sections are same for all 4th gens EXCEPT vtec model H22A2

Luder · Post by **Luder** » Mon Sep 02, 2024 6:42 pm

Wow, thanks man for the great reply!! Much appreciated.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Tue Sep 03, 2024 11:08 am

Top man, vanzep!

Post by **Merlin** » Wed Sep 04, 2024 9:47 am

ME and Vanzep were chatting about this the other night. If there are any differences in the VTEC mid-pipe compared to the 2.0 and 2.3 it must be minor as the part numbers are 2/3rd's the same. It could be that there is a little difference in length due to a different CAT size (the CAT part numbers are different too).

Post by **vanzep** » Wed Sep 04, 2024 2:43 pm

Here is info on size of catalytic convertors
Knowledge Base - CAT / DeCAT Sizes (4th & 5th)
also there can be some differences in orientation of the three bolts on the cat to middle section JDMvsUKDM in some cases this can be dealt with by elongation a couple of the bolt holes on the mid pipe (at least that is what i remember)
Also worth noting that the exhaust path follows the same route on all ludes (at least from cat back) so if you can get a whole system inc downpipe then that can be swapped same goes for 5th gen exhaust