For a long time I've wanted my car slightly more aggressive sounding but not louder. The whol setup is JMTC Super 42, catless 2.5" downpipe, stock S model cat/resonator mid section, into the JCW tuner exhaust. I recently found a JCW tuner rear section on craigslist for $300 with tips, super lucky.

Since I've never seen anyone post how this setup sounds, I figured I'd upload a short clip.

Sport mode off first bit, on second bit.

Inside the car the change from stock S rear section to JCW Tuner rear section was a very small difference. Outside the car, it's drastically different sounding. Interior noise is not all that much louder than a stock S model, the only notable drone is coasting in gear, decelerating, as the RPM fall from 2000 down, slight resonance. In an R58, it may be a lot worse with the metal top to resonate as well.

Chassis brace bars did need to be extended away from the body about 3/4" using spacers and longer bolts to avoid hitting the JCW rear section.

 

Nice

My setup is the Clubman version of what you did, except stock S turbo. Catless downpipe, stock S mid pipe with cat and resonator, into JCW rear mufflers. I also have a custom burble tune from @Lou@Prototype-R If I let off throttle above 3500rpm, it’s like opening the lid on the popcorn machine. Its sooo much fun. I also like that the exhaust is still quiet enough in “normal” mode that I can be cruising down the highway and still have a conversation on on my phone through the Bluetooth