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Relieve piston to prevent seizes
It's not shown in the picture but we have to cut out a small section of the crankcase and fan cover to clear the center drive shaft
Full Mod Fujiwara 38cc Engine with 40mm bore top end
And most other large scale on-road cars
Yamadude stepped in to assist and was a huge help with design and flow bench testing
1415 - Stainless Steel OBR HPI Baja 5B/5T/5SC Pipe Relieve piston to prevent seizesDoes not fit Rovan 45cc engine without modifications to the header! OBR stainless steel pipe fits all HPI Baja's and primal dragsters. We've gone with stainless steel to prevent rust and the need for plating, powder coating etc This pipe was exclusively designed and dyno tuned around our engines and there is not a better performing pipe out there for an OBR engine. Also runs well on stock and ported engines by other tuners. Being racers at OBR this is
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