Hi.
I fitted one of these stainless 4 branch manifolds to my G40 (manifold badged as a TA tecnix but made by the same company as Hot tuning I believe), only to have to take it off again because it fouled the anti roll bar. it also runs quite close (a mm or two) to the 'T' type bracket on the charger, although many people don't use this bracket.
If you had the anti roll bar blocks fitted it should be fine, I couldn't be arsed messing with it to be honest.
If you are willing to mess about to get it to fit you can buy mine off me for £100, brand new, never actually run on the car, a few scuffs from fitting but nothing of any note. (sorry if this should be in the classifieds, I just thought it was relevant)
cheers
mark (email at mark@royhatfield.com)