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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This Part Fits:

Year	Make	Model	Submodel
1963	Ford	300	Base
1963-1972	Ford	Country Sedan	Base
1963-1974,1987-1991	Ford	Country Squire	Base
1987-1991	Ford	Country Squire	LX
1965-1972	Ford	Custom	Base
1964-1972	Ford	Custom 500	Base
1963-1970	Ford	Fairlane	500
1966-1967	Ford	Fairlane	500XL
1963-1969	Ford	Fairlane	Base
1978-1979	Ford	Fairmont	Base
1978-1979	Ford	Fairmont	Futura
1964-1970	Ford	Falcon	Base
1964-1970	Ford	Falcon	Futura
1964-1965	Ford	Falcon	Futura Sprint
1965	Ford	Falcon Sedan Delivery	Base
1963-1967	Ford	Galaxie	Base
1963-1972	Ford	Galaxie 500	Base
1963	Ford	Galaxie 500	Sunliner
1963	Ford	Galaxie 500	Victoria
1963-1970	Ford	Galaxie 500	XL
1972-1974	Ford	Gran Torino	Base
1973-1974	Ford	Gran Torino	Brougham
1974	Ford	Gran Torino	Elite
1972-1974	Ford	Gran Torino	Sport
1972-1974	Ford	Gran Torino	Squire
1975-1980	Ford	Granada	Base
1978-1980	Ford	Granada	ESS
1975-1980	Ford	Granada	Ghia
1966-1969	Ford	GT40	MK III
1965-1972,1977-1982,1984-1985	Ford	LTD	Base
1970-1972,1984-1985	Ford	LTD	Brougham
1979-1986	Ford	LTD	Country Squire
1986	Ford	LTD	Country Squire LX
1980-1986	Ford	LTD	Crown Victoria
1986	Ford	LTD	Crown Victoria LX
1977-1979	Ford	LTD	Landau
1985	Ford	LTD	LX Brougham
1980-1982	Ford	LTD	S
1987-1991	Ford	LTD Crown Victoria	Base
1987-1991	Ford	LTD Crown Victoria	LX
1987-1991	Ford	LTD Crown Victoria	S
1977-1979	Ford	LTD II	Base
1977-1978	Ford	LTD II	Brougham
1979	Ford	LTD II	Landau
1977-1979	Ford	LTD II	S
1971-1977	Ford	Maverick	Base
1975-1977	Ford	Maverick	Grabber
1964-1973,1979	Ford	Mustang	Base
1969-1971	Ford	Mustang	Boss 302
1979	Ford	Mustang	Ghia
1982	Ford	Mustang	GL
1982	Ford	Mustang	GLX
1970-1973	Ford	Mustang	Grande
1982-1995	Ford	Mustang	GT
1984	Ford	Mustang	GT-350 20th Anniversary
1995	Ford	Mustang	GTS
1982,1984	Ford	Mustang	L
1984-1993	Ford	Mustang	LX
1970-1973	Ford	Mustang	Mach 1
1965-1968	Ford	Mustang	Shelby GT-350
1966	Ford	Mustang	Shelby GT-350H
1993-1995	Ford	Mustang	SVT Cobra
1993	Ford	Mustang	SVT Cobra R
1975-1978	Ford	Mustang II	Base
1975-1978	Ford	Mustang II	Ghia
1975-1978	Ford	Mustang II	Mach 1
1963-1972	Ford	Ranch Wagon	Base
1970	Ford	Ranch Wagon	Police Cruiser
1977-1981,1983-1988,1991-1992	Ford	Thunderbird	Base
1978	Ford	Thunderbird	Diamond Jubilee
1984-1986	Ford	Thunderbird	Elan
1984-1985	Ford	Thunderbird	Fila
1979,1981,1983	Ford	Thunderbird	Heritage
1983-1988,1991-1993	Ford	Thunderbird	LX
1980	Ford	Thunderbird	Silver Anniversary
1983-1988	Ford	Thunderbird	Sport
1978-1981	Ford	Thunderbird	Town Landau
1971	Ford	Torino	500
1968-1974	Ford	Torino	Base
1970-1971	Ford	Torino	Brougham
1968-1971	Ford	Torino	GT
1969-1971	Ford	Torino	Squire
1980,1982-1987	Lincoln	Continental	Base
1982-1987	Lincoln	Continental	Givenchy
1982	Lincoln	Continental	Signature
1983-1985	Lincoln	Continental	Valentino
1980-1983	Lincoln	Mark VI	Base
1982-1983	Lincoln	Mark VI	Bill Blass
1982	Lincoln	Mark VI	Givenchy
1982-1983	Lincoln	Mark VI	Pucci
1982-1983	Lincoln	Mark VI	Signature
1984-1987	Lincoln	Mark VII	Base
1984-1992	Lincoln	Mark VII	Bill Blass
1984-1992	Lincoln	Mark VII	LSC
1984-1985	Lincoln	Mark VII	Versace
1981-1990	Lincoln	Town Car	Base
1982-1990	Lincoln	Town Car	Cartier
1990	Lincoln	Town Car	Cypress
1990	Lincoln	Town Car	Executive
1982-1990	Lincoln	Town Car	Signature
1989	Lincoln	Town Car	Signature SE
1990	Lincoln	Town Car	Touring Edition
1977-1980	Lincoln	Versailles	Base
1964-1967	Mercury	Caliente	Base
1986	Mercury	Capri	5.0
1979	Mercury	Capri	Base
1979	Mercury	Capri	Ghia
1982-1985	Mercury	Capri	RS
1987-1991	Mercury	Colony Park	GS
1987-1991	Mercury	Colony Park	LS
1964-1969,1971-1977	Mercury	Comet	Base
1967	Mercury	Commuter	Base
1967-1970,1977-1979,1983-1986	Mercury	Cougar	Base
1969	Mercury	Cougar	Boss 302
1977	Mercury	Cougar	Brougham
1983-1988,1991-1992	Mercury	Cougar	LS
1967-1970,1977-1981,1987-1988,1991-1993	Mercury	Cougar	XR-7
1964-1970	Mercury	Cyclone	Base
1969	Mercury	Cyclone	CJ
1970	Mercury	Cyclone	GT
1969-1970	Mercury	Cyclone	Spoiler
1979-1986	Mercury	Grand Marquis	Base
1979-1986	Mercury	Grand Marquis	Colony Park
1987-1991	Mercury	Grand Marquis	GS
1983-1991	Mercury	Grand Marquis	LS
1979-1982,1985	Mercury	Marquis	Base
1979-1982	Mercury	Marquis	Brougham
1975-1980	Mercury	Monarch	Base
1975-1977	Mercury	Monarch	Ghia
1976	Mercury	Monarch	Grand Ghia
1968-1974	Mercury	Montego	Base
1972-1973	Mercury	Montego	GT
1968-1974	Mercury	Montego	MX
1970-1974	Mercury	Montego	MX Brougham
1970-1974	Mercury	Montego	Villager
1964-1967	Mercury	Villager	Base
1966-1967	Mercury	Voyager	Base
1978-1979	Mercury	Zephyr	Base
1978-1979	Mercury	Zephyr	Z7