When i have a bit more money i am going to mess with mine just for a bit of fun, and then put it on the rollers to see what it makes. I would be pretty happy/ impressed if it made 60-70 bhp. The only problem i have is the damn cat. Cant get rid of it as i have an M reg

Buy a straight thru pipe then stick original one back on for mot?

main benefit being the cam in the gt head.. coupled with bike carbs makes a quick 1 liter dan!

Not come across anyone on here with a gt head on an aau/hz bottom end with standard injection so don't know what the results would be like..

I'm in the middle of this head swap the now,

I've got the head and cam on and the aau spi tb and inlet manifold atm, the car starts and runs fine with a good idle and feels as if it revs alot faster and possibly higher than it used to, and teh exhast note has improved for sure :)

Still haven't been able to drive it yet the due to having no brakes yet so i cant report on any performance difference the head and cam makes yet but it does sound and feel alot better already and i will be sure to let you all know once I've taken it a drive