Red Line® engine and transmission lubricants have long been the choice of racers and knowledgeable engine builders. The thermal stability, film strength and reduced parasitic drag found in Red Line engine oil all contribute to lower operating temperatures, increased engine life and more power. This defines Red Line® motor oil as a superior product for air-cooled engines, the heart of all American motorcycles. Red Line’s transmission lubricants enhance smooth shifting, lower operating temperatures and reduce transmission noise. Red Lines’® racing heritage is reflected in all of their products…you’ll see more Red Line® products at the track than any other lubricant manufacturer for all of these reasons.

Red Line® V-Twin Transmission Oil With Shockproof is by far the best transmission oil you can buy for use in Big Twin 4, 5 or 6 speed street bikes – you’ll immediately notice smoother shifting and quieter operation! V-Twin Transmission Oil with ShockProof® provides unequalled protection for both stock and aftermarket American V-Twin transmissions. This product dampens transmission noise (reducing the notorious shifting “clunk” found in these gearboxes), dramatically reduces temperature, provides thicker oil films between gear teeth and completely resists throw-off. This stuff is magic in a bottle!

Red Line® V-Twin Transmission Oil With Shockproof is available in quarts only.

Weight 2.3 lbs
Country of Origin

Oil Type


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