Replacing exhaust requires cat removal as well?

Spookymonster · Post by **Spookymonster** » Wed Aug 29, 2007 11:59 am

Looks like it's all one piece. Does a new exhaust on an 1100R mean removal of everything past behind the headers?

Pretty sure the answer's yes, but I wanted to get in on the ground floor of the new forum

.

Arbee · Post by **Arbee** » Thu Aug 30, 2007 6:11 am

Correct its a two piece unit, headers & the remainder.

nj-boxer · Post by **nj-boxer** » Sun Jan 20, 2008 10:56 am

Did you ever put an aftermarket catalytic convertor bypass system on your bike? I'm considering doing it now and would like to know how it went and what product you selected.

Don

omg1010 · Post by **omg1010** » Sun May 11, 2008 5:13 am

Since the exhaust of the R1100R consists of 2 pieces (manifold and the rest), removing the rear part includes the cat. I am running a complete new solution on mine: replaced the asymetric manifold of the R with the one of the RS model and using a 2-piece (cat + exhaust) aftermarket exhaust made by a company called ZACH (made of stainless steel). Bought the ZACH system 2nd hand thru an online auction and paid EURO 280.

The ZACH system produces an awsome sound and weighs much less than the original system. But it is said to cost 1-2 HP's compared to the original. Anyway I got a new chip and aftermarket camshafts and the dyno reports my R with 87.4 HP.

Kind regards from sunny Germany
Oliver

BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board