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Valvetrain
Advance and Retard Cam Bushings

4-Advance-and-Retard-Cam-Bushings-HRC 94505An easy way to advance or retard your cam timing. These offset bushings come in packs of 5 (4 offset & one 0°). Precision manufactured to offer precise timing of your cam. Requires drilling a 13/32” hole in camshaft timing gear.



94505 Set of 5, Even (0°, 2°, 4°, 6°, 8°) 94510 Set of 5, Odd (0°, 1°, 3°, 5°, 7°)
94505:4505-0 Each, 0° 94510:4510-1 Each, 1°
94505:4505-2 Each, 2° 94510:4510-3 Each, 3°
94505:4505-4 Each, 4° 94510:4510-5 Each, 5°
94505:4505-6 Each, 6° 94510:4510-7 Each, 7°
94505:4505-8 Each, 8°

Aluminum Cam Thrust Buttons

HRC 94580 Cam ButtonDesigned to control cam end play. Excessive cam play can cause inaccurate ignition timing and premature timing chain wear. Simply pushes into front of cam gear.


94582 Chev SB, .600" Long
94580 Chev SB, .800" Long
94585 Chev BB, .950" Long

Exhaust Rotator Eliminators

4-Exhaust-Rotator-Eliminators-HRC 96045These .300” thick spacers are used to make up the difference when doing away with factory big block Chevy exhaust rotators. No more having to stack shims to take up the difference. These exhaust rotator eliminators also provide a step for the valve spring so it cannot walk around on the cylinder head. For springs up to 1.565” dia. Set of 8.


96045 Rotator Eliminator, Exhaust, Big Block Chevrolet

Guide Plates

2-Guide-Plates-HRC 94600Pushrod guide plates reduce the unwanted sideways motion of the pushrod under load. This keeps the rocker arm stabilized, making the valve operation much smoother and more efficient. Made from heat-treated chrome moly steel to reduce wear.


94600 Chev SB, 5/16” Flat
94601 Chev SB, 5/16” Raised
94602 Chev SB, 3/8” Raised
94610 Chev BB, 3/8”
94611 Chev BB, 7/16”
94620 Ford SB, 5/16” Flat
94625 Ford 429-460, 5/16”

Lash Caps

3-Lash-Caps-HRC 93210Today’s race engine technology and extreme cam profiles subject the tip of the valve stem to a tremendous amount of pounding. Designed to protect the valve stem under the most harsh conditions. Manufactured from premium quality chrome moly steel. Precision machined and ground perfectly flat to maintain accuracy. Provides a better wear surface for increased valve stem life. Lengthens valve .080” to correct rocker geometry. A must for high rpm engines. Sets of 16.


93200 5/16” x .250” Tip
93205 11/32” x .250” Tip
93210 3/8” x .250” Tip

Lifter Valley Breather Tubes

performance-hydraulic-liftersAllows crankcase pressure to rise unobstructed, allowing more speedy oil drain back to the oil pan. Sets of 8.

92145 Chev V8

Rocker Arm Studs

1-Rocker-Arm-Studs-HRC 94656Manufactured from tough 8740 steel, featuring a large ground radius fillet to provide increased support to the stud shank, effectively eliminating bending and subsequent breakage. All studs are precision machined with rolled threads and heat treated for tensile strength of 180,000 PSI then finished in black oxide. Each kit contains 16 studs.


“A”, “B”, “C”
94650 Chev SB and other standard 3/8” applications 3/8”-24, 7/16”-14, 1.750”
94652 Chev SB 3/8” with Roller Rockers 3/8”-24, 7/16”-14, 1.895”
94651 Chev SB standard 7/16” applications 7/16”-20, 7/16”-14, 1.770”
94656 Chev SB 7/16” w/Roller Rockers & Girdles 7/16”-20, 7/16”-14, 1.900"
94657 Chev BB Mark IV 7/16”-20, 7/16”-14, 1.750”
94655 Chev BB 7/16” w/Roller Rockers & Girdles 7/16”-20, 7/16”-14, 1.900”
94650 Ford SB standard 3/8” applications 3/8”-24, 7/16”-14, 1.750”
94656 Chev SB standard 7/16” applications 7/16”-20, 7/16”-14, 1.900”

Roller Cam Thrust Buttons

HRC 94570_5 Roller ButtonsFull needle bearing design. Maintains proper cam end play that can cause inaccurate timing and premature timing chain stretch. A must for roller cam applications.


94570 Chev SB, .800” Long
94575 Chev BB, .950” Long

“The Cam Tube”



7-The-Cam-Tube-HRC Cam-Tube
  • The most protective cam package available
  • Greatly improves cam survival if dropped
  • Great for storage and shipping
  • High impact injected molded plastic

Valve Spring Cups

1-Valve-Spring-Cups-HRC 960xxHowards™ valve spring cups are made from specially hardened chrome moly steel and finished in a rich black oxide for maximum durability. Spring cups will prevent unwanted valve spring movement and galling of the cylinder heads. Machining may be required. .060” thick. Sold in sets of 16.


Max Spring O.D., Cup O.D., Cup I.D., Wall Shoulder Height, Use Cutter Part Number
96005 1.475”, 1.570”, .640”, .150”, 92075
96010 1.565”, 1.670”, .640”, .150”, 92075
96015 1.550”, 1.680”, .577”, .150”, 92075
96020 1.650”, 1.780”, .640”, .150”, NA

Valve Spring Locators

2-Valve-Spring-Locators-HRC 96030Spring locators are similar to spring cups, but have the locating shoulder moved from the outside of the spring to the inside. This style requires less head machining than standard cups. Accurate and durable, .060” thick (except 96023 .035”). Sold in sets of 16.


Max Spring O.D., Locator O.D., Locator I.D., Wall Shoulder Height, Shoulder Diameter, Use Cutter Part Number
96023 1.290”, 1.270”, .505”, .145”, .675”, NA
96024 1.550”, 1.550”, .570”, .140”, .690”, 92070
96025 1.550”, 1.540”, .640”, .180”, .720”, 92070
96030 1.550”, 1.535”, .570”, .140”, .720”, 92070
96031 1.550”, 1.550”, .570”, .140”, .730”, 92070
96033 1.550”, 1.550”, .570”, .140”, .790”, 92070
96034 1.550”, 1.550”, .570”, .140”, .810”, 92070
96035 1.625”, 1.625”, .620”, .175”, .760”, 92075
96040 1.625”, 1.625”, .570”, .175”, .765”, 92075

Valve Spring Shims

3-Valve-Spring-Shims-HRC Valve-ShimsCritical when setting up proper valve spring height and pressures. High quality heat-treated valve spring shims are designed to handle the immense pressures of todays racing valve springs.Must specify thickness. Available in .015”, .030” and .060”. Sets of 16.


96205-15 1.250” x .812” x .015”
96205-30 1.250” x .812” x .030”
96205-60 1.250” x .812” x .060”
96210-15 1.250” x .875” x .015”
96210-30 1.250” x .875” x .030”
96210-60 1.250” x .875” x .060”
96215-15 1.437” x .645” x .015”
96215-30 1.437” x .645” x .030”
96215-60 1.437” x .645” x .060”
96220-15 1.437” x .765” x .015”
96220-30 1.437” x .765” x .030”
96220-60 1.437” x .765” x .060”
96225-15 1.480” x .703” x .015”
96225-30 1.480” x .703” x .030”
96225-60 1.480” x .703” x .060”
96235-15 1.480” x .765” x .015”
96230-15 1.500” x 1.031” x .015”
96230-30 1.500” x 1.031” x .030”
96230-60 1.500” x 1.031” x .060”
96240-15 1.640” x .635” x .015”
96240-30 1.640” x .635” x .030”
96240-60 1.640” x .635” x .060”
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