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Ultra Pro Magnum™Ultra Pro Magnum™ XDMagnumHigh Energy™
Ultra Pro Magnum™
COMP Cams® Steel Stud Mount Rockers

Ultra Pro Magnum™

  • Investment cast 8650 chromemoly body and arched, web-like design increase strength and rigidity while reducing moment of inertia
  • Unique black oxide exterior finish helps prevent corrosion, thus increasing durability
  • Optimized retainer and valve spring clearances allow use of most diameter springs, retainers and +.050" locks without clearance or fitment issues
  • Feature oversized trunions, precision-sorted needle bearings and hardened roller tips

The new Ultra Pro Magnum™ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums™, but they also take stud mount rocker performance, stability and value to a whole new level. The modern arched, web-like design delivers increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance.



Part # Description Ratio Stud Dia.
Chevrolet
1601-12   V6 200-262 1.52 3/8"
1601-16   V8 265-400 1.52 3/8"
1602-12   V6 200-262 1.6 3/8"
1602-16   V8 265-400 1.6 3/8"
1604-12   V6 200-262 1.52 7/16"
1604-16   V8 265-400 1.52 7/16"
1605-12   V6 200-262 1.6 7/16"
1605-16   V8 265-400 1.6 7/16"
1607-8   V8 265-400 Twisted Wedge Head, Intake Valve 1.52 3/8"
1609-8   V8 265-400 Twisted Wedge Head, Intake Valve 1.6 3/8"
1608-8   V8 265-400 Twisted Wedge Head, Intake Valve 1.52 7/16"
1610-8   V8 265-400 Twisted Wedge Head, Intake Valve 1.6 7/16"
1617-12   V6 1988 & Later w/ Self Aligning Rockers 1.52 3/8"
1617-16   V8 1988 & Later w/ Self Aligning Rockers 1.52 3/8"
1618-12   V6 1988 & Later w/ Self Aligning Rockers 1.6 3/8"
1618-16   V8 1988 & Later w/ Self Aligning Rockers 1.6 3/8"
1620-16   V8 396-454 1.7 7/16"
1629-16   V8 348-409 1.7 3/8"
GM LS
1675-16   LS1/LS6 1.8 3/8"
1676-16   LS3 (Factory Offset) 1.8 3/8"
Ford
1619-12   V6 3.8L 1.7 3/8"
1630-16   V8 Boss 302, 351C, 429-460 1.7 7/16"
1631-16   V8 289-302-351W 1.6 3/8"
1632-16   V8 289-302-351W 1.6 7/16"
1634-16   V8 Self Aligning Rockers 1.6 3/8"
Ford
1619-12   V6 3.8L 1.7 3/8"
1630-16   V8 Boss 302, 351C, 429-460 1.7 7/16"
1631-16   V8 289-302-351W 1.6 3/8"
1632-16   V8 289-302-351W 1.6 7/16"
1634-16   V8 Self Aligning Rockers 1.6 3/8"
Chrysler (Shaft Mount)
1622-16   V8 273-360 (Requires ball/ball pushrod) 1.5 Shaft
1621-16   V8 383-440 (Requires ball/ball pushrod) 1.5 Shaft

A. Requires ball/ball pushrod

*50-State legal for 1993 and older GM vehicles equipped with 200 c.i.d.
(4.2L) to 454 c.i.d. (7.4L) gasoline engines. C.A.R.B. E.O. #D-279-4.

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