Boomba Racing

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Boomba Racing is proud to present our new Evo X - Ralliart Hybrid Intake Manifold.

Boomba Racing has been manufacturing a 75 mm throttle body for Evo X's for quite some time. We never could take full advantage of our throttle body because the stock intake manifold bottle necked right after the TB. The stock manifold flange could not be opened more than 65mm without compromising the manifold walls. So far there are no aftermarket intake manifolds that offer a 75 mm TB opening. We decided to solve the problem ourselves and created a hybrid manifold that has a 75 mm diameter opening but still utilizes the factory manifolds plenum and runners. We designed a special adaptor that can be welded to the stock manifold. This adaptor has a 75 mm through opening and the flange accepts a Boomba Racing 75 mm throttle body. We also have a special reducer plate that allows you to mount a stock throttle body to the Boomba Hybrid Manifold.



After the flange is welded we hand polish the internal walls to create a smooth transition from the flange to the plenum.



Now Boomba's Throttle body can help poor 4B11 breathe properly.



After installation and drivability tests we strapped our shop Evo X to the dyno and ran several tests.
First we tested a stock throttle body to establish our baseline. Next we installed a Boomba 64 mm throttle body (which is stock TB bored to 64 mm). We noticed a peak torque gain of 5ft-lb and 2 hp. Gains were consistant all the way from midrange up to red line.

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After that it was time to try Boomba Racing's 75 mm TB. We had a peak torque gain of 6 ft-lb and 15 hp. Gains were significantly higher from midrange to red line.

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Manifolds and throttle bodies are in stock available for immediate shipping.