Rocker Arm Studs Choose from three different series of
GM LS Valve Spring Kits
rocker studs. High Energy and Magnum rocker studs work well with moderate valve lift and spring pressures. The Hi-Tech Race studs are ideal for high RPM roller cam-equipped race cars.
Designed exclusively for popular GM LS engines, kits are for use with hydraulic roller or some solid roller camshafts and include a carefully selected set of performance valve springs, retainers, locks, seals and spring seats. Part No. Description Application COM26918CS-KIT Beehive Valve Spring Kit Hyd. Roller/.625" Max. Lift COM26925TS-KIT Dual Valve Spring Kit Hyd./Solid Roller/.660" Max. Lift COM26926TS-KIT Dual Valve Spring Kit Hyd./Solid Roller/.675" Max. Lift Valve Spring Compressor
Base Thread Size Length 7/16" .680" 7/16" .750" 7/16" .680" 7/16" .750" 5/16" .680" 7/16" .680"
Stud Size 3/8" 7/16" 3/8" 7/16" 3/8" 3/8" 7/16" 7/16" 3/8"
Stud Length 1.750" 1.750" 1.750" 1.750" 1.750" 1.750" 2.000" 1.900" 1.900"
Part No.
Description
COM4500-16 COM4501-16 COM4502-16 COM4503-16 COM4505-16 COM4507-8* COM4514-16 COM4542-16 †
High Energy Studs High Energy Studs Magnum Studs Magnum Studs
COM4504-16 Magnum Ford Studs
Hi-Tech Race Studs
Hi-Tech Race BB Chevy 7/16" 1.680" 7/16"
For GM LS COM5462 Easy-to-use Valve Spring Compressor is designed
COM4512-16 Hi-Tech Race BB Chevy 7/16" .750"
Mark V/VI BB Chevy
3/8" .750"
Magnum Dodge/Olds 5/16" .580" 1.520" * Designed to be used on exhaust for aluminum heads. † Must be used with guide plates. Rocker Arm Adjusting Nuts Alloy nuts provide ultimate
exclusively for use on GM LS engines. Tool allows removing one or two valve springs at a time with the heads installed or off of the engine. GM LS Valve Spring Shims
strength and locking force. Stud girdle poly locks are ground for minimum runout and tapered for extra strength in the locking area. Part No.
Used to set the desired installed height, shims are engineered for GM LS engines that include 1.300” OD valve spring pockets and .520” valve guides. Offered in .015”, .030” and .060” thicknesses. Sold in packs of 16. Part No. Description COM4717-16 Valve Spring Shims, .015” Thick COM4763-16 Valve Spring Shims, .030” Thick COM4788-16 Valve Spring Shims, .060” Thick
Description
Stud Size
COM4508-16 COM4508S-1 COM4509-16 COM4510-8 COM4600-16 COM4601-16 COM4602-16 COM4603-16 COM4604-16
Stud Girdle Adjusting Nuts
7/16" 7/16" 3/8" 7/16" 7/16"
Stud Girdle Adjusting Nut With Snap Ring
Stud Girdle Adjusting Nuts
BB Chevy Intake Stud Girdle Adjusting Nuts Hi-Tech Polylock For Aluminum/Stainless/ Pro Magnum Rockers Hi-Tech Polylock For Aluminum/Stainless/ Pro Magnum Rockers
3/8" 3/8"
Magnum Polylock Magnum Polylock High Energy Polylock
7/16" 3/8"
Beehive Valve Springs Single Beehive Valve Springs offer more RPMs, added horsepower and increased durability. Springs eliminate damaging harmonics, provide increased valvetrain efficiency and allow use of smaller, lighter retainers. Well suited to street/strip or mild drag race applica- tions. Sold in sets of 16.
Load @ Checking Height
Load @ Open Height
Matched Retainers
OD In.
ID In.
Coil Bind Ht. In.
Lock Angle
Part No.
Lbs. 160 155 120 105 130 110 123 93
In.
Lbs. 420 198 377 275 293 318 292 284
In.
Steel
Titanium
COM26056-16 1.454" COM26113-16 1.061" COM26120-16 1.445" COM26125-16 1.101" COM26915-16 1.290" COM26918-16 1.290" COM26981-16 1.240" COM26986-16 1.412"
.731" .738" 1.000" .650" .885" .885" .650" 1.000"
1.800" 1.570" 1.880" 1.640" 1.800" 1.800" 1.700" 1.750"
1.150" 1.020" 1.280" 1.040" 1.200" 1.200" 1.175" 1.175"
1.100" COM703 COM785 10°
.952" COM700 COM702
7°
1.230" COM795 COM794 10°
.970" COM700 COM702 1.085" COM774 COM772 1.085" COM774 COM772
7° 7° 7°
1.115" COM787 1.040" COM787
— 7° — 7°
Single Outer Valve Springs
Load @ Checking Height Load @ Open Height Coil Bind Ht. In. Lbs. In. Lbs. In.
Matched Retainers Lock Angle Steel Titanium
OD. In.
ID In.
Part No.
Description
COM901-16 COM910-16 COM911-16 COM926-16 COM936-16 COM940-16 COM941-16 COM942-16 COM972-16 COM975-16 COM980-16 COM981-16 COM983-16 COM984-16
Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Outer Spring With Damper Single Inner Spring
1.494" 1.040" 1.354" .940" 1.525" 1.035" 1.475" .992" 1.539" 1.055" 1.464" 1.025" 1.260" .876" 1.437" .974" 1.460" 1.010" .953" .697" 1.230" .821" 1.254" .820" 1.250" .836" 1.430" 1.010"
101
1.650" 1.850" 1.900" 1.800" 1.900" 1.900" 1.750" 1.700" 1.800" 1.500" 1.700" 1.700" 1.700" 1.750"
242 275 306 316 325 232 359 284 308 127 229 295 310 219
1.250" 1.160" COM740 COM730 10°
85
1.350" 1.280"
N/A
N/A N/A
122 108 149 135 115 125 89
1.400" 1.200" COM741 COM732 10° 1.300" 1.140" COM740 COM730 10° 1.350" 1.225" COM741 COM732 10° 1.300" 1.200" COM740 COM730 10° 1.250" 1.130" COM750 COM728 10° 1.200" 1.125" COM747 COM730 10° 1.250" 1.195" COM740 COM730 10° 1.250" 1.260" COM742 COM728 7° 1.250" 1.150" COM742 COM728 7° 1.000" .950" N/A N/A N/A
55 91
105 105
Ovate Spring
1.200" 1.150" COM751
–
10°
Outer Spring With Damper
94
1.250" 1.150" COM740 COM730 10°
205
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