Crower 66490-2 Features:

Crower 66490-2 severe-duty mechanical roller lifters, pair for SBC 1986-up and Bowtie applications Raised pushrod seat design with +0.300 in. height for late-model blocks with taller lifter bores Lightweight cutaway billet alloy body with heavy-duty stainless steel alignment blade for rigidity Fits standard 0.842 O.D. lifter bores; one-piece body, crowned outer races, and crowned bearings

Severe Duty Rollers Raise Raised-seat SBC Cutaway, .842 In. Features:

• Raised +0.300 in. pushrod seat for 1986-up SBC and Bowtie blocks, correcting valvetrain geometry in taller lifter-bore applications
• Billet alloy cutaway body reduces reciprocating weight while maintaining severe-duty rigidity for high-rpm, high-cylinder-pressure racing use
• Heavy-duty stainless steel alignment blade and integral 1-piece body promote lifter stability, axle trueness, and precise roller control
• Standard 0.842 in. O.D. lifter bore fitment with crowned outer races and crowned bearings to reduce lobe tracking and extend service life
• Mechanical roller lifter pair design for raised-seat late-model SBC setups; oil restrictors not recommended with this lifter style