I’m currently using Jenvey direct to head 45mm bodies, these new bodies were designed in partnership with SBD and Jenvey.
These bodies have the injector high up the inlet for better fuel/air mixing and also the injectors are from underneath which is better for throttle response.
Whilst the old DTH bodies I have are great these are the next level up.
In back to back testing SBD claim, with verifiable evidence, to have seen 13 BHP gains over the original throttle body design they use. So we’ll see.