Darton Dry Block Replacement Sleeves for Chevy GM LS7 Engine

  
Darton Dry Block Replacement Sleeve for Chevy GM LS7 Engine. Flanged Darton Dry Sleeves for. Engines replace your factory cylinder liners with high strength iron sleeves, eliminating a weak link in your engine and providing you with the strength needed to get the full potential from your setup without losing any sleep worrying about cracking a factory sleeve and taking the engine out.