The old stock exhaust..
The new HPE slimline exhaust..
A vast improvement on looks I'm sure you'll agree. :o)
Not a vast improvement on power. Coupled with a K&N it's helped produce 2-3 BHP through out the rev range but most noticeably at the top end. Maybe next year I'll go for the front system too. Which could potentially add about 15 BHP around the mid range which would be very use-able.
I think it looks ace and sounds nice too, gives the beemer a nice low rumble. Just thought I'd share ;o)
X-posted to my journal, uk_bikers and motorcycles