Aston Martin DB4 1958-1963
Aston Martin DB5 1963-1965
Aston Martin DB6 1965-1970
Aston Martin DBS 1967-1972
Bentley Continental 1952-1965
Bentley S1 1955-1959
Bentley S2 1959-1962
Bentley S3 1962-1965
Bentley T1 1965-1977
Bentley T2 1977-1980
Bristol 400 1947-1950
Bristol 401 1948-1953
Bristol 402 1949-1950
Bristol 403 1953-1955
Bristol 404 1953-1955
Bristol 405 1955-1958
Bristol 406 1958-1961
Bristol 407 1961-1963
Bristol 408 1963-1966
Bristol 409 1966-1970
Bristol 410 1968-1976
Bristol 411 1969-1976
Bristol 412 1975-1985
Daimler Conquest 1953-1957
Daimler Majestic 1958-1964
Daimler Majestic Major 1959-1968
Daimler SP250 1959-1964
Jaguar E-Type 1961-1975
Jaguar Mark 2 1959-1967
Jaguar Mark X 1961-1970
Jaguar S-Type 1963-1968
Jaguar XJ6 1968-1973
Jaguar XJ12 1972-1974
Jaguar XJ Series 1 1968-1973
Jaguar XJ Series 2 1973-1979
Jaguar XJ Series 3 1979-1992
Jaguar XJ40 1986-1994
Jaguar XJS 1975-1996
Jensen 541 1954-1959
Jensen CV8 1962-1966
Jensen FF 1966-1971
Jensen Interceptor 1966-1976
Lagonda 3 Litre 1953-1958
Lagonda Rapide 1961-1964
Lagonda V8 1961-1964
MG MGA 1955-1962
MG MGB 1962-1980
MG MGC 1967-1969
MG Midget 1961-1979
Morris Minor 1956-1971
Rolls-Royce Silver Cloud 1955-1966
Rolls-Royce Silver Shadow 1965-1980
Rolls-Royce Silver Wraith 1946-1959
Rolls-Royce Silver Dawn 1949-1955
Rolls-Royce Silver Spur 1980-1997
Rolls-Royce Silver Spirit 1980-1998
TVR Grantura 1958-1967
TVR Griffith 1963-1965
TVR Tuscan 1967-1971
Triumph GT6 1966-1973
Triumph Herald 1959-1971
Triumph Spitfire 1962-1980
Triumph Stag 1970-1977
Triumph TR2 1952-1955
Triumph TR3 1955-1962
Triumph TR4 1961-1965
Triumph TR5 1967-1968
Triumph TR6 1969-1976
Triumph TR7 1974-1981
Triumph TR8 1978-1981

Champion

- Part name: Champion Spark Plug RHM83N
- Part number: RHM83N / CCH639
- Part type: Industrial Spark Plug
- Replaces OEM part number(s): 639
- Brand: Champion
- Features: Engineered for industrial equipment, designed with precious metals, F.I.S.S resistor technology and Hot Lock, compatible with CO2 reduction and alternative fuels, suitable for high-compression and aggressive environments, manufactured for superior performance and durability, able to withstand high-temperature and high-load service environments, backed by global engineering from Federal-Mogul, fabricated with precious metals, FISS and Hot Lock designs
- Compatibility: Compatible with alternative fuels (gases)
- Cross reference: Use the cross reference table above or contact us for assistance in determining the correct part for your vehicle.

Standard shipping with tracking via Royal Mail or Evri for heavier parts:
- £4.99 per order for standard 2-day delivery
- £5.99 per order for Next Day delivery

Most orders are shipped the same business day if ordered before 2pm. We ship Monday through Friday.

If we unexpectedly run out of stock we may have to order your part which can take up to 1 week. We will be in touch in the rare circumstance that there is a delay to your shipment.

We want you to be completely happy with your purchase but please do not hesitate to contact us immediately if you have a problem with your order. Please ensure that you consider all the points described on our profile page accessible by clicking our name above the product title.

It is especially important that you take due care to ensure that the part you selected is compatible with your car. If in doubt, we'd prefer that you get in touch via our profile page so we can help you.