It's no secret that drag racing engines take a pounding. Every quarter mile turned is usually a hardcore thrashing. Hard Blok may be the winning secret you need. It's your best weapon against cracked blocks and preventing out of round cylinder walls in your drag racing engine. Hard Blok has been proven to extend engine life by filling the water jackets. It remains stable at all temperatures and won't erode in water. It's also non-hazardous and non-corrosive.
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