MeanMachine

Hello,

I have a 928 Koenig S4 and I want to add a nice rumble to the car without being obnoxiously loud or sounding like an "american v8".

What would you guys recommend to get a nice european v8 sound ?

X pipe or X pipe + rmb ?

Would you install X pipe alone ?

jleidel

The RMB alone is very tasteful. I have an X-Pipe+RMB and its a tad loud. Some time in the future, I'll be on the market for suitable mufflers to quiet things down.

davek9

I would start out with the X, you can easily exchange the rear muffler for the RMB in 20 mins. when some extra bark needed

MeanMachine

^ my thoughts exactly.

percentage wise how loud is x pipe alone on a stock 928 ?

Avar928

X-pipe and Hi-Flo cats on a stock 928, you will notice significantly more "roar". Wish I had decibel numbers but I was very surprised on how much meaner she sounded.

X-pipe before RMB if you were going to do one first. It's really the only exhaust upgrade that does true justice to the car.

MeanMachine

Thanks I have made my choice, will get the X pipe and install it whilst the car is going through a major service.

MFranke

On my 87 the x-pipe is about 10% louder than stock On my 88 the x-pipe is about 20% louder than stock. Cats deleted. No RMBs. Both are very modest sound level increases and sound great. This is just my ears listening. I haven't tried to measure it.

MeanMachine

Will it fit on a stock 88 S4 ?

mine is ROW version

Mike B

My assessment is pretty much the same as Mark's.

Mike B

MY 88 is a ROW model (Japan) and the x-pipe I got from Roger was perfect.

Avar928

I think the X-pipe will fit on any year 85 and above?

May also want to delete your air pump too. My X-pipe already had a airpump line to it so it's all hooked up. I kept mine.

...but after performing the TB/WP, I wish I just deleted it off the car. I may do that eventually one day.

MeanMachine

a link to his website would be highly appreciated.

Mike B

Sure...his website shows very little that he offers. Like many vendors he has, or can obtain, any 928 part you may require including aftermarket items like the x-pipe.

928sRus

MeanMachine

Thank you highly appreciate it.

davek9

Great time to replace the O2 sensor if you don't know how old yours is