.

RPM Range: 3000-7200

Advertised Duration: 300/310

Duration @ .050: 245/255

Lift: .510/.535

Lobe Center: 112c

Chevrolet V8 57-87 262-265-283-302-305-327-350-400

SB Chevy Hydraulic Flat Tappet- Strong upper mid-range and top-end. 11.0:1 minimum. High stall required. Cam and lifter kit.

Chet Herbert Cams has been grinding cams since 1949. Performance, high quality and a low price. Everything you want in a performance cam and more. Cams for your tow rig, street performance, street-strip or race. If you need assistance picking out a cam please call our tech line at (704)732-2400.

Tech Tip: When checking for valve spring coil bind, also check for retainer to valve guide clearance. There should be a minimum of .150? clearance between the guide (or valve seal if used) and the retainer.

Tech Tip: Flat tappet cams (hyd. or solid lifter) require to be broken in for the first 30 minutes of operation at 2000 rpm. During this time do not let the engine idle. If adjustments are required during this break-in period, you must shut the engine down completely. If using a spring with over 130 lbs. seat (or over 330 open), you should remove the inner spring during break-in.

ATTENTION!!
IMPORTANT WARRANTY INFORMATION ON ALL HERBERT FLAT TAPPET CAMS.
 

Due to changes in the current oil available the following changes are necessary in regards to warranty on flat tappet (Solid or Hydraulic) camshafts.

For ANY warranty claim to be valid the following HERBERT parts must be purchased and used at the time of camshaft installation.

• New Herbert lifters
• Herbert cam break in lube part# EF301, Comp Cams # 159or Red Line #81403
• New Herbert valve springs matched to the cam per our catalog requirements
  

  Street cams (less that .500 lift, and less than .550 lift on big blocks) are warranted for a period of 1 year from date of purchase with proof of purchase and required installation parts. Race flat tappet cams (more that .500 lift on small blocks & more than .550 lift on big blocks) only carry a warranty to be free from defects in materials and workmanship, they do NOT carry any guarantee against wear due to the extreme usage of racing.

  
  

  If you follow the proper installation instructions your new Chet Herbert cam will give you the type of performance that has won races and made us leaders in valve train innovation since 1949.

  
  
  Sincerely,
  Herbert Tech Department