SKU: 75362241462

Comp Cams Drag Race, 321JR-12  Super Comp, 5000 stall, 500

$255.01 $283.34
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Description

Comp Cams Drag Race, 321JR-12  Super Comp, 5000 stall, 500Drag Race, 321JR 12 Super Comp, 5000 stall, 500+ c. i. Lifter Type: Solid Roller Lifter Engine Family: Chevrolet 396 454 c. i. 8 CYL. 1965 1996 Description: Mechanical Roller Super Comp. 5000 stall, 500+ c. i. Cam Family: Drag Race Mechanical Roller Camshafts Specification: RPM Range: 5000 to 7500 Valve Timing: 0. 02 Lobe Separation: 112 Intake Centerline: 112 Valve Lash: 0. 028 Intake 0. 03 Exhaust Duration: 321 Intake 336 Exhaust Duration @ . 050"

Drag Race, 321JR-12 
Super Comp, 5000 stall, 500+ c.i.

  • Lifter Type: Solid Roller Lifter
  • Engine Family: Chevrolet 396-454 c.i. 8 CYL. 1965-1996
  • Description: Mechanical Roller-Super Comp. 5000 stall, 500+ c.i.
  • Cam Family: Drag Race Mechanical Roller Camshafts

Specification:

  • RPM Range: 5000 to 7500
  • Valve Timing: 0.02
  • Lobe Separation: 112°
  • Intake Centerline: 112°
  • Valve Lash: 0.028 Intake/0.03 Exhaust
  • Duration: 321 Intake/336 Exhaust
  • Duration @ .050" Lift: 286 Intake/298 Exhaust
  • Valve Lift: 0.748 Intake/0.748 Exhaust
  • Lobe Lift: 0.44 Intake/0.44 Exhaust


Vehicle Fitments:

Year Make Model Submodel
1967 - 1975 Chevrolet Bel Air Base
1967 - 1972 Chevrolet Biscayne Base
1973 - 1974 Chevrolet Blazer Base
1969 - 1972 Chevrolet Brookwood Base
1978 - 1980 Chevrolet C10 Big Ten
1975 - 1980 Chevrolet C10 Scottsdale, Custom Deluxe, Silverado, Cheyenne, Custom
1968 - 1974 Chevrolet C10 Pickup Base
1968 - 1974 Chevrolet C10 Suburban Base
1975 - 1980 Chevrolet C10 Suburban Silverado, Custom Deluxe, Scottsdale
1990 - 1993 Chevrolet C1500 454 SS, WT, Silverado, Cheyenne
1990 - 1991 Chevrolet C1500 Base
1990 - 1992 Chevrolet C1500 Scottsdale
1986 Chevrolet C20 Base
1975 - 1986 Chevrolet C20 Cheyenne, Scottsdale, Silverado
1981 - 1986 Chevrolet C20 Custom
1975 - 1980 Chevrolet C20 Custom Deluxe
1981 Chevrolet C20 Deluxe
1968 - 1974 Chevrolet C20 Pickup Base
1968 - 1974 Chevrolet C20 Suburban Base
1981 - 1986 Chevrolet C20 Suburban Custom
1975 - 1980 Chevrolet C20 Suburban Custom Deluxe
1981 Chevrolet C20 Suburban Deluxe
1975 - 1986 Chevrolet C20 Suburban Silverado, Scottsdale
1993 Chevrolet C2500 400 SS, Custom
1991 - 1992 Chevrolet C2500 Scottsdale
1991 - 1995 Chevrolet C2500 Silverado, Base, Cheyenne
1994 - 1995 Chevrolet C2500 WT
1992 - 1995 Chevrolet C2500 Suburban Base
1995 Chevrolet C2500 Suburban LT, LS
1992 - 1994 Chevrolet C2500 Suburban Silverado
1975 - 1982 Chevrolet C30 Base
1975 - 1981 Chevrolet C30 Cheyenne
1981 - 1986 Chevrolet C30 Custom
1975 - 1980 Chevrolet C30 Custom Deluxe
1981 Chevrolet C30 Deluxe
1975 - 1986 Chevrolet C30 Silverado, Scottsdale
1968 - 1974 Chevrolet C30 Pickup Base
1994 - 1995 Chevrolet C3500 Base
1988 - 1995 Chevrolet C3500 Cheyenne, Silverado
1988 - 1992 Chevrolet C3500 Scottsdale
1967 - 1972 Chevrolet Camaro Base, SS, RS, Z28
1967 - 1974 Chevrolet Caprice Base
1973 - 1976 Chevrolet Caprice Classic
1976 Chevrolet Caprice Classic Estate, Classic Landau
1975 - 1976 Chevrolet Caprice Classic Sport
1973 - 1974 Chevrolet Caprice Estate
1975 Chevrolet Caprice Estate Wagon
1967 - 1968 Chevrolet Chevelle 300
1967 - 1969 Chevrolet Chevelle 300 Deluxe
1967 - 1972 Chevrolet Chevelle Concours, SS, Base
1967 - 1973 Chevrolet Chevelle Deluxe
1969 - 1972 Chevrolet Chevelle Greenbrier, Concours Estate
1968 - 1972 Chevrolet Chevelle Nomad, Malibu
1968 Chevrolet Chevy II Nova
1967 - 1974 Chevrolet Corvette Base
1967 - 1975 Chevrolet El Camino Base
1975 Chevrolet El Camino Classic
1968 - 1974 Chevrolet El Camino Custom
1968 - 1975 Chevrolet El Camino SS
1969 - 1970 Chevrolet Estate Base
1973 - 1974 Chevrolet G10 Van Base, Sportvan
1976 Chevrolet G20 Chevy Van, Sportvan, Beauville
1973 - 1974 Chevrolet G20 Van Base, Sportvan
1975 - 1996 Chevrolet G30 Sportvan, Chevy Van, Beauville, Hi-Cube
1973 - 1974 Chevrolet G30 Van Sportvan, Base
1967 - 1976 Chevrolet Impala Base
1976 Chevrolet Impala Custom Landau, S
1975 - 1976 Chevrolet Impala Sport, Custom
1967 Chevrolet Impala SS
1976 - 1980 Chevrolet K10 Scottsdale, Cheyenne, Custom Deluxe, Silverado
1968 - 1974 Chevrolet K10 Pickup Base
1968 - 1974 Chevrolet K10 Suburban Base
1976 - 1980 Chevrolet K20 Custom Deluxe, Silverado, Cheyenne, Scottsdale
1968 - 1974 Chevrolet K20 Pickup Base
1968 - 1974 Chevrolet K20 Suburban Base
1985 Chevrolet K20 Suburban Scottsdale, Silverado, Custom
1991 - 1995 Chevrolet K2500 Cheyenne, Silverado
1991 - 1992 Chevrolet K2500 Scottsdale
1994 - 1995 Chevrolet K2500 WT, Base
1992 - 1995 Chevrolet K2500 Suburban Base
1995 Chevrolet K2500 Suburban LS, LT
1992 - 1994 Chevrolet K2500 Suburban Silverado
1977 - 1981 Chevrolet K30 Cheyenne
1981 - 1986 Chevrolet K30 Custom
1977 - 1980 Chevrolet K30 Custom Deluxe
1981 Chevrolet K30 Deluxe
1977 - 1986 Chevrolet K30 Silverado, Scottsdale
1968 - 1974 Chevrolet K30 Pickup Base
1994 - 1995 Chevrolet K3500 Base
1988 - 1995 Chevrolet K3500 Cheyenne, Silverado
1988 - 1992 Chevrolet K3500 Scottsdale
1976 Chevrolet K5 Blazer Base
1976 - 1978 Chevrolet K5 Blazer Cheyenne
1977 - 1978 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1969 - 1972 Chevrolet Kingswood Estate, Base
1973 - 1975 Chevrolet Laguna Base
1973 Chevrolet Laguna Estate
1975 Chevrolet Laguna S3
1974 Chevrolet Laguna Type S-3
1967 - 1975 Chevrolet Malibu Base
1974 - 1975 Chevrolet Malibu Classic
1975 Chevrolet Malibu Classic Estate
1973 - 1974 Chevrolet Malibu Estate
1970 - 1974 Chevrolet Monte Carlo Base
1973 - 1974 Chevrolet Monte Carlo Landau
1973 - 1975 Chevrolet Monte Carlo S
1969 - 1972 Chevrolet Nova Base
1973 Chevrolet P10 Van Base
1976 - 1979 Chevrolet P20 Base, Step-Van
1970 - 1973 Chevrolet P20 Van Base
1975 - 1997 Chevrolet P30 Base
1975 - 1990 Chevrolet P30 Step-Van
1970 - 1974 Chevrolet P30 Van Base
1988 Chevrolet R20 Cheyenne
1987 - 1988 Chevrolet R20 Custom Deluxe, Scottsdale, Silverado
1987 Chevrolet R20 Suburban Custom Deluxe
1987 - 1988 Chevrolet R20 Suburban Silverado, Scottsdale
1989 Chevrolet R2500 Silverado, Scottsdale, Cheyenne
1989 - 1991 Chevrolet R2500 Suburban Scottsdale, Silverado
1988 Chevrolet R30 Cheyenne
1987 - 1988 Chevrolet R30 Scottsdale, Silverado, Custom Deluxe
1989 - 1990 Chevrolet R3500 Scottsdale
1989 - 1991 Chevrolet R3500 Silverado, Cheyenne
1969 - 1972 Chevrolet Townsman Base
1987 Chevrolet V20 Suburban Custom Deluxe
1987 - 1988 Chevrolet V20 Suburban Scottsdale, Silverado
1990 Chevrolet V2500 Suburban Silverado, Scottsdale
1988 Chevrolet V30 Cheyenne
1987 - 1988 Chevrolet V30 Custom Deluxe, Scottsdale, Silverado
1989 - 1991 Chevrolet V3500 Cheyenne, Silverado
1989 - 1990 Chevrolet V3500 Scottsdale
1972 - 1979 Excalibur Phaeton Base
1977 - 1978 GMC C15 Heavy Half
1975 - 1978 GMC C15 High Sierra, Sierra Classic, Base, Sierra Grande
1977 GMC C15 Indy Hauler
1978 GMC C15 Street Coupe
1975 - 1978 GMC C15 Suburban Sierra Classic, Sierra Grande, High Sierra, Base
1968 - 1974 GMC C15/C1500 Pickup Base
1968 - 1974 GMC C15/C1500 Suburban Base
1979 - 1980 GMC C1500 Heavy Half, Sierra Grande, Sierra Classic, Base, Street Coupe, High Sierra
1979 - 1980 GMC C1500 Suburban Sierra Classic, Sierra Grande, High Sierra, Base
1975 - 1978 GMC C25 High Sierra, Sierra Classic, Sierra Grande, Base
1975 - 1978 GMC C25 Suburban Sierra Classic, Sierra Grande, High Sierra, Base
1968 - 1974 GMC C25/C2500 Pickup Base
1968 - 1974 GMC C25/C2500 Suburban Base
1979 - 1986 GMC C2500 Base, Sierra Classic, High Sierra
1979 - 1982 GMC C2500 Sierra Grande
1994 - 1995 GMC C2500 Sierra SL, Sierra SLT
1991 - 1995 GMC C2500 Sierra SLE
1991 - 1993 GMC C2500 Sierra, Sierra SLX
1979 - 1995 GMC C2500 Suburban Base
1979 - 1986 GMC C2500 Suburban High Sierra, Sierra Classic
1979 - 1982 GMC C2500 Suburban Sierra Grande
1992 - 1995 GMC C2500 Suburban SLE
1995 GMC C2500 Suburban SLT
1975 - 1978 GMC C35 High Sierra, Sierra Classic, Sierra Grande, Base
1968 - 1974 GMC C35/C3500 Pickup Base
1979 - 1986 GMC C3500 Base, Sierra Classic, High Sierra
1979 - 1982 GMC C3500 Sierra Grande
1994 - 1995 GMC C3500 Sierra SL, Sierra SLT
1988 - 1995 GMC C3500 Sierra SLE
1988 - 1993 GMC C3500 Sierra, Sierra SLX
1975 - 1976 GMC G25 Vandura, Rally STX, Rally
1976 GMC G35 Vandura Special, Magnavan, Rally Camper Special, Vandura, Rally, Rally STX
1974 GMC G35/G3500 Van Base
1973 - 1974 GMC G35/G3500 Van Rally, Vandura
1988 GMC G3500 Rally Custom
1988 - 1996 GMC G3500 Rally STX, Vandura, Rally Camper Special, Vandura Special, Rally, Magnavan
1973 - 1976 GMC Jimmy Base
1976 GMC Jimmy High Sierra, Sierra Grande, Sierra Classic
1976 GMC K15 Base, High Sierra, Sierra Grande, Sierra Classic
1968 - 1974 GMC K15/K1500 Pickup Base
1968 - 1974 GMC K15/K1500 Suburban Base
1979 - 1980 GMC K1500 Sierra Classic, High Sierra, Sierra Grande, Base
1976 - 1978 GMC K25 Base, Sierra Grande, Sierra Classic, High Sierra
1976 - 1977 GMC K25 Suburban Sierra Grande, Base, Sierra Classic, High Sierra
1968 - 1974 GMC K25/K2500 Pickup Base
1968 - 1974 GMC K25/K2500 Suburban Base
1994 - 1995 GMC K2500 Sierra SL, Sierra SLT
1991 - 1995 GMC K2500 Sierra SLE
1991 - 1993 GMC K2500 Sierra SLX, Sierra
1992 - 1995 GMC K2500 Suburban Base, SLE
1995 GMC K2500 Suburban SLT
1968 - 1974 GMC K35/K3500 Pickup Base
1979 - 1986 GMC K3500 Base, High Sierra, Sierra Classic
1979 - 1982 GMC K3500 Sierra Grande
1994 - 1995 GMC K3500 Sierra SL, Sierra SLT
1988 - 1995 GMC K3500 Sierra SLE
1988 - 1993 GMC K3500 Sierra, Sierra SLX
1979 GMC P1500 Value Van, Base
1970 - 1971 GMC P25/P2500 Van Base
1975 - 1978 GMC P35 Base, Value Van
1970 - 1974 GMC P35/P3500 Van Base
1974 GMC P35/P3500 Van Motorhome
1979 - 1997 GMC P3500 Base
1979 - 1990 GMC P3500 Value Van
1987 - 1989 GMC R2500 Sierra Classic, High Sierra, Base
1987 - 1991 GMC R2500 Suburban Base
1987 GMC R2500 Suburban High Sierra
1987 - 1989 GMC R2500 Suburban Sierra Classic
1990 GMC R2500 Suburban SLE
1987 - 1991 GMC R3500 Base
1987 - 1989 GMC R3500 High Sierra, Sierra Classic
1990 - 1991 GMC R3500 SLE
1971 - 1975 GMC Sprint Base
1975 GMC Sprint Classic, High Sierra, SP
1972 - 1974 GMC Sprint Custom
1987 - 1991 GMC V3500 Base
1987 - 1989 GMC V3500 High Sierra, Sierra Classic
1990 - 1991 GMC V3500 SLE
1969 - 1974 Iso Grifo Base
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 75362241462

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TFugate
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★★★★★ 5
Great Ink
Size: High Capacity, Style: Ink
Great quality ink. I have ordered it several times for my printer, and it works great. I've never had any compatibility issues, and the print quality is great as well.
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Reviewed in the United States on August 8, 2025
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AV
Carnegie, US
★★★★★ 5
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Size: High Capacity, Style: Ink
I have nothing bad to say about the quality of t he Epson Ink Cartridges. A bit too expensive though so I onlt print when I need to but the quality is always there.
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Reviewed in the United States on June 2, 2024
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Kee
Dallas, US
★★★★★ 5
Bright, Dependable, and Jam-Free — Excellent Printer Paper!
Size: 1 Ream | 500 Sheets, Style: Letter (8.5x11)
The Amazon Basics Multipurpose Copy Printer Paper is a dependable and high-quality choice for all the daily printing needs, offering a bright white finish that makes text and images look sharp and professional. It feeds smoothly through the printer without any jams or misfeeds, which is essential for maintaining productivity throughout the day. The 20 lb weight feels sturdy and durable, making it perfect for everything from internal memos to important client documents. A great value-for-money purchase that provides consistent results every single time.
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Reviewed in the United States on May 23, 2026
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Susan Hoag
Carnegie, US
★★★★★ 5
A Reliable Office Essential That Keeps Our Body Shop Running Smoothly
Size: 10 Reams | 5000 Sheets, Style: Letter (8.5x11)
In a busy auto body shop, we print a lot of paperwork every single day. Between repair estimates, insurance documents, invoices, work orders, and customer paperwork, having a dependable supply of printer paper is a necessity. Amazon Basics Multipurpose Copy Printer Paper has become one of those products that we always make sure to keep in stock. The quality has been excellent for our everyday office needs. It feeds through our printers smoothly, produces clean, sharp documents, and we haven't experienced the jams or inconsistent performance that can sometimes come with lower-quality paper. Whether we're printing simple forms or detailed estimates, it gets the job done. Another reason we continue to purchase it is the value. Running a business means paying attention to operating costs, and this paper offers a great balance between affordability and quality. We go through a large volume of paper, so being able to save money without sacrificing performance is a huge advantage. I also appreciate the convenience of ordering it through Amazon. Instead of making extra trips to the office supply store, we can have it delivered directly to the shop and know that we'll always have enough on hand when we need it. Overall, this has become our go-to copy paper for our business. It's dependable, high quality, and priced competitively. For any busy office, repair shop, or business that prints a large amount of paperwork, I think this is an excellent choice. We will definitely continue to purchase it and keep it stocked in our office.
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Reviewed in the United States on June 7, 2026
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JD
Massapequa, US
★★★★★ 5
Great paper good price
Size: 3 Reams | 1500 Sheets, Style: Letter (8.5x11)
This is a solid everyday paper option that does exactly what it’s supposed to do. The packaging was good—everything arrived in perfect condition with no bent corners or damaged reams. It’s nice not having to deal with warped paper right out of the box. Printing quality has been consistent. I’ve used it for both home and work printing, and it feeds smoothly through the printer without jams. The brightness is good too—text comes out clear and sharp, and colors look decent for standard copy paper. Overall, it’s reliable, good quality paper at a fair price. I’d definitely buy it again.
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Reviewed in the United States on June 8, 2026

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