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looks beautiful when you pop the bonnet
Engineered for durability and precision
The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine
They are welded from high quality steel with performance screens
Ford 351C Cleveland Natural Steel Main Girdle Only looks beautiful when you popSpeedmaster Steel main girdles are machined from 1045 steel. Speedmaster has designed these main cap girdles to reinforce the alignment of the main caps in high performance applications and counter the limited webbing and weaknesses of those stock blocks. Flat surfaces are finished with CNC machine center for accuracy and smoothness.
