Page 13 of Valvetrain and Timing 2008 by Parts Pro

proform valvetrain proform is the value leader in valvetrain components offering friction reducing rocker arms us made high performance pushrods and valvetrain tools and accessories primarily suited for street and sportsman racers you can afford to add high performance to your engine when you choose proform ls1/ls6 shaft mount rockers engineered to replace the factory rockers and fit under the stock gm valve covers obviously roller rockers reduce internal friction and wear as well as prolong valve train component life they can be used with all types of engine oil and additive lubricants description ls1/ls6 engines 1.7 ratio ls1/ls6 engines 1.8 ratio new extruded aluminum roller rocker arms rid your engine of internal friction with roller-tipped rocker arms the raceproven full needle bearing fulcrum and roller tip not only unleash horsepower they also lengthen valve train component life and reduce wear and tear on valve stem tips precision machined to insure consistency and ratio accuracy 16 extruded aluminum roller rockers and 16 poly locks description part no 66907c 66908c 66909c 66910c 66920c 66914c 66915c 66913c 66911c 66912c 66861c 66879 66878 66860c chevy sb 1.5 ratio 3/8 stud chevy sb 1.6 ratio 3/8 stud chevy sb 1.5 ratio 7/16 stud chevy sb 1.6 ratio 7/16 stud chevy sb 1.5 ratio 3/8 stud 8 pcs 1.6 ratio 3/8 stud 8 pcs chevy sb w/center hold-down valve cover 1.5 ratio 3/8 stud self aligning chevy sb w/center hold-down valve cover 1.6 ratio 3/8 stud self aligning chevy bb 1.6 ratio 7/16 stud ford sb 1.6 ratio 3/8 stud ford sb 1.6 ratio 7/16 stud ford 302 boss 351c 429-460 77-94 ford alum s/b pedestal mt 302ho 351w hyd roller cams 1.6 ratio 5/16 stud 77-94 ford alum s/b pedestal mt 302ho 351w hyd roller cams 1.7 ratio 5/16 stud oldsmobile 350-455 1.6 ratio 7/16 stud part no 67940 67941 heavy duty extruded aluminum roller-rocker arms for chevy sb fits chevytm small block engines heavy duty 1.6 ratio 7/16 stud full needle bearing fulcrum and roller tip to eliminate friction which in turn equals more horsepower and longer valve train component life each set includes 16 extruded aluminum roller rockers and 16 poly locks description chevy chevy chevy chevy sb sb sb sb 1.5 1.6 1.5 1.6 ratio ratio ratio ratio 3/8 stud 3/8 stud 7/16 stud 7/16 stud part no 66928 66929 66930 66931 1-piece pushrods heat-treated .065 wall thickness 4130 chromemoly for use with guide plates gloss black finish each end is precision formed with specified radius for optimum wear characteristics with minimal metalto-metal friction 16 pieces per package description chevy chevy chevy chevy chevy chevy chevy chevy chevy chrysler shaft rocker system rid your engine of internal friction with roller-tipped rocker arms the raceproven full needle bearing fulcrum and roller tip not only unleash horsepower they also lengthen valve train component life and reduce wear and tear on valve stem tips precision machined to insure consistency and ratio accuracy 16 extruded aluminum roller rockers and 16 poly locks description part no 66869 66868 mopar sb 1.5 ratio supplied with hardened shaft hardware mopar bb 1.5 ratio supplied with hardened shaft hardware part no description part no 66409c 66410c 66413c 66414c 66423c 66415c 66427c sb 5/16 stock length 66891c sb 5/16 100 66892c sb 5/16 160 66402c sb 5/16 200 66403c sb 5/16 oem roller 66404c sb 5/16 craneŽ roller 66405c sb 3/8 stock length 66406c bb 3/8 stock length 66407c bb 7/16 stock length 66408c chevy bb 3/8 405 tall deck ford 5/16 289-302 69-94 ford 5/16 351c ford 5/16 429 super cj70 ford 5/16 289-302 with oem rollers 57-81 pontiac v8 287-455 64-84 oldsmobile v8 with hydraulic lifters 3/8 260-403 cast chromemoly rocker arms cast of tough chromemoly alloy perfect for the average street engine more rigid and durable than the stock stamped varitey roller tip reduces friction description part no 66933c 66925c 66926c 66927c 1.5 1.6 1.5 1.6 ratio ratio ratio ratio 3/8 3/8 3/8 3/8 stud stud stud self aligning stud self aligning high-performance 3-piece pushrods premium high-grade steel tips welded on not pressed on heat treated for use with guide plates description chevy sb v6/90° 5/16 100 s/b chevy sb v6/90° 5/16 stock length chevy bb 3/8 stock length part no 66889c 66890c 66894c 2-piece pushrod sets description chrysler engines 5/16 la 273-360 hydraulic chrysler engines 3/8 b 383-400 adj hydraulic chrysler engines 3/8 rb 413-426-440 adj hydraulic ford 289-302 engines 3/8 fe-ford adj mechanical shell ford 289-302 engines 3/8 fe-ford adj hydraulic stamped stock long-slot rocker arms part no 66417c 66419c 66421c 66425c 66426c fits chevy small block engines for use when roller tip is not required proven oem quality extra long slot eliminates rocker to stud interference when using high lift cams 16 rockers grooved balls and nuts per package description chevy sb 1.5 ratio 3/8 stud chevy sb 1.6 ratio 3/8 stud part no 66905 67300 140 some parts are not legal for sale or use in california on any pollution controlled motor vehicle.

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