NASCAR-Approved Spec Engine

The NASCAR-Approved Spec Engine is an alternative for competitors in the ARCA Menards Series, NASCAR Whelen Modified Tour, and NASCAR Pinty’s Series.  (A new engine for a new series is coming soon.  Check back for details.)

The foundation of the NASCAR-Approved Spec Engine is a production GM LS2 block (6.0L / 4.000) with LS2 CNC ported heads. Fully assembled the 364 cubic inch engine weighs around 415 pounds and produces approximately 610hp and 500 ft-lbs of torque.

The Spec Engine is not a “sealed” engine and NASCAR rules do allow teams to assemble, disassemble and rebuild the Spec Engine but no modifications to the components are allowed other than what is stated in the current rule books.