Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
Catalog
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Year	Make	Model	Submodel
1959-1971	Chrysler	300	Base
1962-1963	Chrysler	300	Sport
1975-1978	Chrysler	Cordoba	Base
1959-1967	Chrysler	Imperial	Base
1959-1970	Chrysler	Imperial	Crown
1959-1975	Chrysler	Imperial	LeBaron
1959-1974	Chrysler	New Yorker	Base
1972-1978	Chrysler	New Yorker	Brougham
1959-1960,1962-1971,1973-1978	Chrysler	Newport	Base
1967-1976	Chrysler	Newport	Custom
1971-1972	Chrysler	Newport	Royal
1959-1960	Chrysler	Saratoga	Base
1959-1977	Chrysler	Town & Country	Base
1959-1961	Chrysler	Windsor	Base
1963-1964	Dodge	330	Base
1963-1964	Dodge	440	Base
1963-1965	Dodge	880	Base
1962-1965	Dodge	880	Custom
1970-1971	Dodge	Challenger	Base
1970-1971	Dodge	Challenger	R/T
1969-1971	Dodge	Charger	500
1966-1974,1976	Dodge	Charger	Base
1967-1971	Dodge	Charger	R/T
1969	Dodge	Charger	SE
1971-1978	Dodge	Charger	Special Edition
1976	Dodge	Charger	Sport
1971	Dodge	Charger	Super Bee
1965-1970	Dodge	Coronet	440
1965-1970	Dodge	Coronet	500
1959,1965-1967,1970-1976	Dodge	Coronet	Base
1971,1975-1976	Dodge	Coronet	Brougham
1971-1976	Dodge	Coronet	Crestwood
1971-1975	Dodge	Coronet	Custom
1966,1968-1970	Dodge	Coronet	Deluxe
1967-1970	Dodge	Coronet	R/T
1968-1970	Dodge	Coronet	Super Bee
1959	Dodge	Custom	Base
1964-1965,1967-1968	Dodge	Dart	270
1962	Dodge	Dart	330
1962	Dodge	Dart	440
1960-1969	Dodge	Dart	Base
1969	Dodge	Dart	Custom
1965-1969	Dodge	Dart	GT
1964,1968-1969	Dodge	Dart	GTS
1960-1961	Dodge	Dart	Phoenix
1960-1961	Dodge	Dart	Pioneer
1969	Dodge	Dart	Swinger
1961-1962	Dodge	Lancer	Base
1978	Dodge	Magnum	XE
1960	Dodge	Matador	Base
1967-1968	Dodge	Monaco	500
1965-1978	Dodge	Monaco	Base
1974,1977-1978	Dodge	Monaco	Brougham
1977-1978	Dodge	Monaco	Crestwood
1974	Dodge	Monaco	Custom
1975-1976	Dodge	Monaco	Royal
1975-1976	Dodge	Monaco	Royal Brougham
1963,1968-1969	Dodge	Polara	500
1960-1973	Dodge	Polara	Base
1971	Dodge	Polara	Brougham
1970-1973	Dodge	Polara	Custom
1970	Dodge	Polara	Special
1959	Dodge	Royal	Base
1975-1977	Dodge	Royal Monaco	Base
1975-1977	Dodge	Royal Monaco	Brougham
1959	Dodge	Sierra	Base
1959	Dodge	Sierra	Custom
1968-1971	Jensen	Interceptor	FF
1968-1969	Jensen	Interceptor	MK I
1970-1971	Jensen	Interceptor	MK II
1972-1976	Jensen	Interceptor	MK III
1972-1973	Jensen	Interceptor	SP
1967-1971	Plymouth	Barracuda	Base
1970-1971	Plymouth	Barracuda	Gran Coupe
1960-1970	Plymouth	Belvedere	Base
1968-1970	Plymouth	Belvedere	Satellite
1965-1967	Plymouth	Belvedere II	Base
1970-1971	Plymouth	Cuda	Base
1960-1961	Plymouth	Custom	Base
1960-1963	Plymouth	Fleet Special	Base
1960-1967,1975-1978	Plymouth	Fury	Base
1971,1975	Plymouth	Fury	Custom
1968,1970-1974	Plymouth	Fury	Custom Suburban
1970,1972	Plymouth	Fury	Gran Coupe
1972	Plymouth	Fury	Gran Sedan
1970	Plymouth	Fury	GT
1974	Plymouth	Fury	Police
1970	Plymouth	Fury	S-23
1976-1978	Plymouth	Fury	Salon
1962-1971,1975-1978	Plymouth	Fury	Sport
1970-1971	Plymouth	Fury	Sport GT
1968,1970-1974	Plymouth	Fury	Sport Suburban
1968,1970-1974	Plymouth	Fury	Suburban
1966,1968-1969	Plymouth	Fury	VIP
1968-1974	Plymouth	Fury I	Base
1965-1966,1968-1974	Plymouth	Fury II	Base
1968-1969,1973	Plymouth	Fury II	Custom Suburban
1965-1974	Plymouth	Fury III	Base
1968-1969	Plymouth	Fury III	Sport Suburban
1972-1977	Plymouth	Gran Fury	Base
1975-1977	Plymouth	Gran Fury	Brougham
1975-1976	Plymouth	Gran Fury	Custom
1975-1976	Plymouth	Gran Fury	Custom Suburban
1975-1977	Plymouth	Gran Fury	Sport
1975-1977	Plymouth	Gran Fury	Sport Suburban
1975-1977	Plymouth	Gran Fury	Suburban
1967-1971	Plymouth	GTX	Base
1968-1975	Plymouth	Road Runner	Base
1965-1974	Plymouth	Satellite	Base
1971	Plymouth	Satellite	Brougham
1971-1974	Plymouth	Satellite	Custom
1971-1974	Plymouth	Satellite	Regent
1971-1974	Plymouth	Satellite	Sebring
1971-1974	Plymouth	Satellite	Sebring Plus
1968-1970	Plymouth	Satellite	Sport
1960-1964	Plymouth	Savoy	Base
1960-1961	Plymouth	Savoy	Deluxe
1960-1961	Plymouth	Sport Wagon	Base
1960-1961	Plymouth	Suburban	Base
1960-1961	Plymouth	Suburban	Custom
1960-1961	Plymouth	Suburban	Sport
1970	Plymouth	Superbird	Base
1967	Plymouth	VIP	Base