Additional Images

Chevrolet Performance 12691728 - Cast Iron L31 Vortec Small Block Chevrolet Assembled Cylinder Head

L31 Vortec Cylinder Head

SKU: 12691728

Chevrolet Performance Parts L31 Vortec Cylinder Cast Iron Heads have set the standard for proven performance and budget spending . The best out-of-the-box head for the money! Excellent flow produces broad torque and killer power. Stock springs are good up to 0.450" lift. Requires special intake manifold to fit the Vortec bolt pattern. Price is per head.

Specifications:

Intake Valve		1.940”
Exhaust Valve		1.500”
Chamber (cc)		64
Intake Port (cc)		170
Exhaust Port (cc)		N/A
Assembled or Bare		Assembled
Valve Spring	Diameter	1.250”
	Max Lift	0.450”
	Type	Stock Single
Spark Plug	Size	14mm
	Reach	0.708”
	Design	Straight
	Suggested Plug	NGK TR55GP

Availability: In Stock - Orders by 2pm CST, ship within 1-2 business days.

Was: $749.87

Sale: $691.74

Save: 8%

Save: $58.13

Description
California Proposition 65
Details
Shipping
Reviews

Description

Patterned from the design of the LT1 cylinder heads from the 1992-96 Corvette, the Vortec iron heads were first used on the fuel injected 1996 pickup truck RP0 Code L31. The heads are equipped with 1.940"/1.500" valves from the factory and the stock valve springs are compatible with a maximum valve lift of up to 0.450".

Stock flow figures at 28” H20 L31 Vortec
Lift	Intake	Exhaust
0.100"	70	48
0.200"	139	101
0.300"	190	129
0.400"	227	140
0.500"	239	147