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BOLT 4 Specifications
BOLT 4 Specifications

The BOLT4 is for those that want the high power and light weight advantage of advanced motorcycle engine technology for their automotive applications.  The BOLT4's robust features including a large journal billet crankshaft and 7075-T6 aluminum case make it well suited for turbo applications.


  • Inline 4 cylinder engine
  • 81mm (to 84)  bore x 57mm (to 70mm) stroke
  • 1175cc to 1400cc in turbo form
  • 1500cc for NA  (84mm bore)
  • Twin cam, 16 valve head
  • Billet steel crankshaft
  • 4340 billet H beam rods
  • 7075 T6 billet crankcase
  • Dry sump oil system with filter, air/oil separator and water pump
  • 10,800 max. rpm
  • 300 to 400+ horsepower (in turbo form)
  • 160 pounds

(click on image below for .pdf version)



 The engine right side incorporates the alternator, starter, oil pump, air oil separator, oil filter and water pump.  This leaves the left side clear for the hot parts- headers, turbo and exhaust. 

Integrated in the oil pump are; one pressure section with relief and filter mount, 3 scavenging sections, an air-oil separator and a water pump.  The pump is manifold mounted on the sump to minimize connections.  The oil pump is made by Dailey Engineering.