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Home :: AMC :: AMC L6 199-258, 4.0L 1964-1995
American Motors L6 199-258 4.0L 1964-1995

1-AMC-L6-1964-1995-HRC 339991
cam recommendation_btnAll Howards™ Cams use the highest-grade race quality cores available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. Most Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.




Cam Part No. Cam & Lifter Set Part No. Duration
IN
Advertised
EX
Duration 
IN
@.050"
EX
Valve w/1.60
IN
Lift Rockers
EX
Lobe Separation Angle Intake Centerline Valve
IN
Lash
EX
Notes
330111-10 NA 257 263 203 209 .443 .448 110 106 Hyd. Hyd.
1000-4400 Mild Street performance. Not for Fuel Injection.          
331021-12 NA 269 269 215 215 .475 .475 112 108 Hyd. Hyd. 1
1400-5000 Moderate Street with headers and better carb/intake. Not for Fuel Injection.          
330991-08 NA 275 275 221 221 .501 .501 108 104 Hyd. Hyd. 1
1800-5600 Fair idle, Hot Street, after market induction & headers a must. Not for Fuel Injection.          
339991 NA Custom Grind Camshaft
Hydraulic Flat Tappet Special Order Camshaft.        
 Hyd. Hyd.  1

Camshaft Notes

1. Stock (O.E.) valve springs cannot be used.
2. Requires thrust button.
3. Cam and lifter sets with "DL" suffix feature Direct Lube™ lifters.
4. Ignition firing order must be changed to 1-8-7-3-6-5-4-2.
5. Requires upgraded distributor gear.
6. Requires 3-Bolt timing set.
7. Requires use of Retro-Fit Tie Bar Hydraulic Roller Lifters.
8. Includes 2 camshafts.
9. Includes 4 camshafts.
10. Ignition firing order must be changed to 1-3-7-2-6-5-4-8.
11. Ignition firing order must be changed to 1-8-7-2-6-5-4-3.
12. Requires custom programmer/tuning.
13. Requires adjustable valvetrain.
14. No specific vacuum rating is guaranteed.
15. Lobes designed to take maximum advantage of .904" dia. lifter.
16. Lobes designed to take maximum advantage of .875" dia. lifter. 

 


cam recommendation_btnHoward Cams, always synonymous with high performance camshafts and valve train innovation, our comments have been top fuel favorites since the early days of drag racing and the basic timing of Howards blown alcohol cams is still used today.

All Howards™ Cams use the highest-grade race quality billets available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. All Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.




cam recommendation_btnHoward Cams, always synonymous with high performance camshafts and valve train innovation, our comments have been top fuel favorites since the early days of drag racing and the basic timing of Howards blown alcohol cams is still used today.

All Howards™ Cams use the highest-grade race quality billets available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. All Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.




cam recommendation_btnHoward Cams, always synonymous with high performance camshafts and valve train innovation, our comments have been top fuel favorites since the early days of drag racing and the basic timing of Howards blown alcohol cams is still used today.

All Howards™ Cams use the highest-grade race quality billets available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. All Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.



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