With our relationship with GMPP we finally received the first three LSX454 crate motors from the Performance Parts arsenal! The engines will be part of our HTR-SS454 lineup through the DeNooyer Performance Division as well as truck line and our HTR-GS454 “Heritage” 2010 Grand Sport Corvette!

Type: ………7.4L GEN4 smallblock

Bore x Stroke……… 4.185″ x 4.125″

Compression: …. 11.0:1

Block: …………… LSX Cast Iron (Siamese Bore)

Cylinder Heads: ……… Cast Aluminum, Rectangular Intake Port w/ 6 bolt configuration.

Valve Diameter (Intake/Exhaust)………. Titanium 2.20″/Hollow Stem 1.61″

Chamber Volume: …. 70cc

Crankshaft: ….. Forged 4340 Steel w/ Nitrite Surface, 0.125″ Radius Rod Pins.

Connecting Rods: …..  Forged 4340 Steel with Bronze Small End.

Pistons: ……………  Aluminum Forged 4032 alloy with Full Floating Pins.

Camshaft: ………… Hydraulic Roller Tappet (.648/.648) (236/246)

Max Engine Speed: ………….. 6500 RPM

 Here is a short video clip from the head of GM Performance Parts, Dr. Jamie Meyers, talking about the parts used in this engine!