My Account
If you are already registered, please log in.
Create your account and enjoy a new shopping experience.
Create A New Account
#SAVETHEFULLSIZEJEEP
A Portion Of The Proceeds From Your Purchase Supports The Development & Reproduction Of High Quality 1963-1991 Restoration Parts.
Thumpr Hydraulic Flat Tappet Cam and Lifter Kit: Big Mutha' Thumpr™ - Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
AMC; Jeep; 4.0; 290; XJ; Cherokee; Wagoneer; Comanche; Grand Wagoneer; Wrangler; JK; Rambler; Eagle; ZJ; Chrysler; AM General; American Motors; 327; 390; 304; 327; 343; 360; 5.9; Rebel; Nash; AMX; Javelin
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
COMP Cams is bringing the muscle car sound back, and it's nastier than ever! Let's face it--few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1974 | Jeep | Cherokee | Base |
| 1975-1983 | Jeep | Cherokee | Base |
| 1981-1982 | Jeep | Cherokee | Chief |
| 1983 | Jeep | Cherokee | Pioneer |
| 1974 | Jeep | Cherokee | S |
| 1975 | Jeep | Cherokee | S |
| 1976-1977 | Jeep | Cherokee | S |
| 1978-1980 | Jeep | Cherokee | Wide Track |
| 1984-1991 | Jeep | Grand Wagoneer | Base |
| 1984-1985 | Jeep | Grand Wagoneer | Limited |
| 1971-1973 | Jeep | J-100 | Base |
| 1970-1973 | Jeep | J-2500 | Base |
| 1970-1971 | Jeep | J-2600 | Base |
| 1972 | Jeep | J-2600 | Base |
| 1973 | Jeep | J-2600 | Base |
| 1970-1971 | Jeep | J-3800 | Base |
| 1971 | Jeep | J-4500 | Base |
| 1972-1973 | Jeep | J-4500 | Base |
| 1971 | Jeep | J-4600 | Base |
| 1972-1973 | Jeep | J-4600 | Base |
| 1971 | Jeep | J-4700 | Base |
| 1972 | Jeep | J-4700 | Base |
| 1973 | Jeep | J-4700 | Base |
| 1971 | Jeep | J-4800 | Base |
| 1972 | Jeep | J-4800 | Base |
| 1973 | Jeep | J-4800 | Base |
| 1974 | Jeep | J10 | Base |
| 1975 | Jeep | J10 | Base |
| 1976-1977 | Jeep | J10 | Base |
| 1978 | Jeep | J10 | Base |
| 1979-1988 | Jeep | J10 | Base |
| 1974-1975 | Jeep | J20 | Base |
| 1976-1977 | Jeep | J20 | Base |
| 1978-1988 | Jeep | J20 | Base |
| 1972-1973 | Jeep | Wagoneer | Base |
| 1974-1976 | Jeep | Wagoneer | Base |
| 1977 | Jeep | Wagoneer | Base |
| 1978 | Jeep | Wagoneer | Base |
| 1979-1982 | Jeep | Wagoneer | Base |
| 1982-1983 | Jeep | Wagoneer | Brougham |
| 1973 | Jeep | Wagoneer | Custom |
| 1974-1975 | Jeep | Wagoneer | Custom |
| 1976 | Jeep | Wagoneer | Custom |
| 1979-1983 | Jeep | Wagoneer | Limited |
| Advertised Exhaust Duration | 312 |
| Advertised Intake Duration | 295 |
| Applications | Fits AMC 290, 304, 343, 360, 390 and 401 |
| Assembly Lubricant Included | Yes |
| Basic Operating RPM Range | 2,500-6,400 |
| C.A.R.B. E.O. Number | N/A |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exemption Reason | N/A |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Cam Type | Hydraulic Flat Tappet |
| Camshaft Gear Attachment | 1-Bolt |
| Camshaft Material | Cast Iron |
| Camshaft Series | Thumpr |
| Description | Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. |
| Engine Family | American Motors 290-401 c.i. 8 Cylinder (1966-1991) |
| Exhaust Duration at .050 inch Lift | 257 |
| Exhaust Valve Lift | 0.497 |
| Gaskets Included | No |
| Intake Duration at .050 Inch Lift | 243 |
| Intake Valve Lift | 0.512 |
| Kit Type | CL-Kit - Cam and Lifter Kit |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | Yes |
| Lobe Separation | 107 |
| Locks Included | No |
| Retainers Included | No |
| Timing Chain and Gears Included | No |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| Valve Stem Seals Included | No |
To submit a return or exchange request, please go to our Contact Us page to submit order information. Photos of any damaged products may be requested and required to process any full or partial refund. If approved, we will provide you with an RMA number along with a return label for shipping.
Parts returned that are not defective, are subject to a 25% restocking charge. JeepRecyclers.com/McDaniel Motor Co. is NOT responsible for any parts that have been altered, modified, disassembled, or damaged by misuse or an accident subsequent to the parts purchase.
Reconditioned parts come with a minimum warranty of 90 days, unless otherwise stated (Refer to product listing for warranty duration). The warranty is void if the parts are not returned in the same condition in which they are sold. Warranties for aftermarket parts are covered by the manufacturer.
What Are My Shipping Fees?
For orders delivered within the continental US where reason for return isn't a result of a JeepRecyclers.com/McDaniel Motor Co. error, the cost of the initial shipping charge and a return fee will be deducted from your refund. A prepaid shipping label(s) will be provided. The flat fee for each item being returned can be found in the chart below:
| Retail cost of the item | Per Item Return Fee |
|---|---|
| Less than $25.00 | $3.75 |
| From $25.00-$49.99 | $5.75 |
| From $50.00-$99.99 | $7.75 |
| More than $100.00 | $9.75 |
COMP Cams
CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.Installation InstructionsInstallation InstructionsThis Part Fits:
COMP Cams
CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.Installation InstructionsInstallation InstructionsThis Part Fits:
COMP Cams
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.Installation InstructionsInstallation InstructionsThis Part Fits:<
COMP Cams
High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.Installation InstructionsInstallation InstructionsThis Part Fits:
COMP Cams
CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.Installation InstructionsInstallation InstructionsThis Part Fits:
COMP Cams
COMP Cams High Energy 260H Hydraulic Flat Tappet Camshaft & Lifter Kit LiftLift: 447"/.447" Duration: 260°/260° RPM Range: 1200-5200: AMC 290-401ci V-8 1966-91: Good low end touque. Strong...
