I installed a Remus catback exhaust. For clarification this is an American E89 Z4. That means that instead of the resonators after the cats we have secondary cats - That's right 4 cats in all. :roll: Any way here's the install - Remus was not the best fit. We got it done but not without some modifications.
1st off there is a bunch of stuff to take off before removing the exhaust - remove a rear brace and a couple of skid plates, then flange bolts at the primary cats, a bracket near the primary cats, and in the rear, disconnect a rubber hangar and ignore the most rear rubber hangar instead remove one 13mm bolt above the back box and drop the hangar bracket and back box complete. Once the rear section was lowered the whole system pulled back and out. We were surprised at how heavy it was.
First thing we did was lay the Remus on top of the old system and get a feel for fit and where to cut. Right away we saw some problems. The bends were not exactly the same and the Remus was a bit long on the right side. In hind sight the manufacture should shorten the right side about 6-8 inches to get out of the curve they had us cutting and fitting in.
We ended up heating and bending the Remus pipe to better fit angle of the pipe at the secondary cat. And then we added a strap same as the OEM system had to hold the width at the rubber mounts. See pics.
1st off there is a bunch of stuff to take off before removing the exhaust - remove a rear brace and a couple of skid plates, then flange bolts at the primary cats, a bracket near the primary cats, and in the rear, disconnect a rubber hangar and ignore the most rear rubber hangar instead remove one 13mm bolt above the back box and drop the hangar bracket and back box complete. Once the rear section was lowered the whole system pulled back and out. We were surprised at how heavy it was.
First thing we did was lay the Remus on top of the old system and get a feel for fit and where to cut. Right away we saw some problems. The bends were not exactly the same and the Remus was a bit long on the right side. In hind sight the manufacture should shorten the right side about 6-8 inches to get out of the curve they had us cutting and fitting in.
We ended up heating and bending the Remus pipe to better fit angle of the pipe at the secondary cat. And then we added a strap same as the OEM system had to hold the width at the rubber mounts. See pics.
North West Surrey
No worries though. We made it work . I can't recommend it to anyone here in the USA.