12K views · 53 reactions | Atomic Performance Barra Crank Dowelling Jigs in stock ready to rock. Worried your barra is going to back out your flex plate/flywheel bolts potentially damaging the crank the flex plate and your gearbox? These are the answer to your problem. allowing you to dowel the flex plate to the crank while the engine is still in the car. #atomicperformance #atomicperformanceproducts | Atomic Performance Products | Facebook