Up locks will produce around .050" more installed height over Std locks.

Machined Billet Steel, Heat Treated, 7 Degree, Single Groove Locks. +.050" Up

Application: 11/32" Single Square Groove Valves, SBF 260-351W, SBC, BBF, Pontiac,

Sold in half sets of 16 halves which is enough for 8 valves. If you need enough for 16 valves, simply order quantity of two.

These are manufactured from billet steel bar stock, the lock is fully machined, not forged or stamped. Precision machined for a precise fit!

Designed to produce MORE installed height which can be a real problem solver when additional installed height is needed.

Manufactured with the lock bead moved .050" off center to increase retainer height by around .050" over std locks.

They can be used for almost any 11/32" single square groove valves except for late SBC, LT1 & vortec engines with self aligning rocker arms. Due to limited clearance between the alignment rails of self aligning rockers and the top of the valve lock surface. If +.050" locks are used, this clearance is reduced and contact with the lock and/or retainer will most likely result- You don't want this to happen. Use +.050" locks only with non self aligning rockers. If you decide to use +.050" locks on SBC w/ self aligning rockers, do so at your own risk.

     Features:

• Fully Machined from Billet Steel Bar Stock
  
• 7 Degree Lock Angle
• Approximately .050" more installed height over Std Locks
  
• Single Groove Square Bead
  
• Comes with 16 halves.
• Enough for 8 valves.
  

NOTE 1 -The amount of increased installed height obtained is limited to locks they're being compared to. Now a days, std locks are coming from many different sources and their heights vary from one brand to another.

NOTE 2- There are certain applications where +.050" locks should not be used. Applications such as Gen 2 Small Block Chevrolet, Vortec and LT1 w/ self aligning rockers should not use them as retainer and lock clearance issues may result. Do not use +.050" locks w/ self aligning rockers period!

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