Howards Cams 122121-10 BBC Hydraulic Flat Tappet

This Howards Cams 122121-10 BBC Hydraulic Flat Tappet Camshaft fits 396-502 cubic inch Mark IV Big Block Chevy engines from 1965-1996. Howards designed this cam for hot marine use, and it features a fair idle and is great with performance MerCruisers. A 9.5:1+ compression ratio, lower rear end gears and a 2000+ stall speed torque converter are highly recommended.

Howards Cams 122121-10 BBC Hydraulic Flat Tappet Camshaft Specs:

• For Big Block Chevy 396-502 engines from 1965-1996
• Basic RPM Range: 1600 to 6000
• Valve Lift Intake: .527
• Valve Lift Exhaust: .533
• Intake Duration: 279
• Exhaust Duration: 289
• Intake Duration at .050”: 225
• Exhaust Duration at .050”: 235
• Lobe Separation: 110
• Intake Centerline: 106
• Firing Order: 1-8-4-3-6-5-7-2
• Recommended Lifter Set: 91111 Performance
• Recommended Premium Lifter Set: 91116 Direct Lube
• Recommended Valve Springs: 98529
• Recommended Valve Spring, Retainer and Lock Kit: 98529-K31
• Made in the USA

Notes: Stock (O.E.) valve springs can NOT be used.

Howards Cams designed this Flat Tappet Hydraulic camshaft for high performance on the street and on the drag strip.

Howards Hydraulic Cams – From mild to wild, they are the ultimate in performance!