Ive been searching and searching the last couple of weeks and cannot find hardly any definitive info on the B20a5 from 3rd gen Preludes. I have a chance to buy one in the next month or so and have a ? I know their are no after market IM's for them and most people opt for the B21a IM because it flows a little better and has dual runners but has anybody here actually retrofit an aftermarket IM from another motor? Ive seen mention of B18 manifolds but no actual pics or write-ups of whats needed or any results of said mod. from what ive gathered these are bastard motors.
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