| Description_ASM |
Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information. |
| Description_DES |
Nitrous HP 240/253 Hydraulic Flat Cam for Chevrolet Small Block |
| Description_DEF |
Engine Camshaft |
| Description_EXT |
Pro Street applications, excellent for multi-stage kits or 671 blower. 2800+ stall. |
| Description_INV |
Nitrous HP 240/253 Hyd Flat Cam SBC |
| Description_SHP |
None |
| Description_KEY |
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10 |
| Description_SHO |
N2O 240/253 HFT SBC |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Lifter Type |
Hydraulic Flat Tappet |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| Advertised Intake Duration |
284 |
| SK-Kit Upgrade |
SK12-568-4 |
| Camshaft Series |
Nitrous HP |
| Lobe Separation |
113 |
| Camshaft Material |
Cast Iron |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Title |
Nitrous HP 240/253 Hydraulic Flat Cam for Chevrolet Small Block |
| Grind Number |
NX284H |
| Assembly Lubricant Included |
Yes |
| Exhaust Valve Lift |
0.525 |
| Lifters Included |
No |
| Engine Family |
Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Usage |
Street/Strip |
| Cam and Lifter Kit Upgrade |
CL12-568-4 |
| Camshaft Gear Attachment |
3-Bolt |
| Exhaust Duration at .050 inch Lift |
253 |
| C.A.R.B. Exemption Reason |
N/A |
| Intake Valve Lift |
0.507 |
| Intake Duration at .050 Inch Lift |
240 |
| K-Kit Upgrade |
K12-568-4 |
| C.A.R.B. Exempt for On-Road Vehicles? |
No |
| C.A.R.B. E.O. Number |
N/A |
| Advertised Exhaust Duration |
305 |
| Valve Springs Required |
Yes |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Amazon ASIN |
B000N5QC2C |
| Basic Operating RPM Range |
2,800-6,800 |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Cam Type |
Hydraulic Flat Tappet |
| Length |
3.0000 |
| Width |
3.0000 |
| Height |
23.0000 |
| Weight |
9.0000 |
