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Best quality! Race-proven durability!
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Our MAP valves feature black oxide nitrating (a superior hardening process) which penetrates into the ultra-EV8 stainless steel core material, forming a super-hard outer layer. This "Black Diamond" finish adds surface hardness as well as a smoother exterior coating which greatly reduces friction. This reduction in friction allows for tighter tolerances (fit) and provides long-lasting durability.
Fits:
- 1963-later Triumph 650/750cc Twins (oversized exhaust)
- 1954-57 Triumph 650cc: T110, TR6 (intake)
- 1953 (only) Triumph 6T (intake)
- 1958-63 T110, TR6 (intake)
- 1959-63 T120 Bonneville (intake)
- 1963-66 Thunderbird, 6T, TR6 [from engine #Du5825] (intake)
Additional features;
- Longest lasting valves available for Triumph twins
- Vastly superior to the stock "hard chrome" valve
- Induction welded, heat-treated tip prevents mushrooming and eliminates the need for lash caps
Oversized Valves Are Available From MAP Cycles, Inc.
- Our oversized valves (OS) are flow tested for maximum performance.
- Oversized valves can also be used to rejuvenate sunken valve seats while correcting valve geometry.
- The OS valve features relocated keeper locations to accommodate hi-lift racing cams and springs. This saves additional machining expense.
NOTE:
- Always be sure to check piston clearance before installing oversize valves
- Will not fit TSS models
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