Small Block Chevy AFR 23 Degree 245 NPP .550 Offset Intake

This 2305 rocker set is designed specifically for the AFR 245 NPP head. The .550 offset is typically used with an on center lifter. If a .180 offset lifter is being used you can go with a .450 offset on the intake.

 

T&D always recommends measuring for the amount of offset required for your particular combination

Cylinder Heads

+ Cylinder Head Mfg / Part #: Head type (aftermarket vs OEM). Part #s are often stamped in front / rear of castings.
+ Valve Length: Measured as overall length or + overlenth from OEM dimensions
+ Spring Diameter: Diameter or Mfg part #.
+ Pushrod Diameter: Width measured in thousandths.
+ Lash Caps: If installed on tip of valve stem – yes or no.
+ Rocker Ratios: Intake & Exhaust
+ Head Porting Information: If yes, please include provider name / company to determine alteration of valve spacing.

Block

+ Block Type / Brand: Mfg / Part # (aftermarket vs OEM).
+ Cam Location: Standard or raised on aftermarket blocks for crankshaft clearance.
+ Deck Height: Standard or raised of aftermarket blocks for large displacement applications
+ Cam Type: Hydraulic, Roller or Hydraulic Roller
+ Lobe or Valve Lift: Lobe if rocker ratio is unknown.
+ Lifter Offset: Standard or Offset (Intake and / or Exhaust)
+ Lifter Height: Standard or Tall

+ Spring Oil Hole:
+ Shotpeening:
+ Std or Lightweight:
+ Needle Bearing Tips:
+ Accessories: 
+ Spare Rockers: Quantity needed.