Picking the right 13b intake manifold for your build
Choosing a 13b intake manifold is one of those decisions that can either make your rotary engine sing or turn it into a massive tuning headache. If you've spent any time working on an RX-7 or a swapped project, you know that the intake path is just as critical as the turbo choice or the porting job. It's the lungs of the engine, and if you're choking it with a restrictive or poorly designed manifold, you're basically leaving horsepower on the table and making your tuner's life miserable. ...