Email received from Jon Crofts re the air box & back plate he ordered:

Just a quick note of thanks for the excellent service and expectation setting re my air box & filter. The product arrived to the day that I was told when I ordered it.
The air box not only looks & sounds great but it has also improved performance on the dyno. Furthermore I'm now down to 96db at 4500rpm at .5 metres for static testing, a loss of 5 db.

Thanks again.

Jon

The car is an MK Indy running 2.0 XE with SBD Throttle Body kit, SBD sump, MBE management system giving 245 Bhp, SBD airbox, Steel Arrow Rods & Pistons, Quaiffe type 9 gearbox & Quaiffe ATB diff.