70-4156, 71-1456, Triumph Primary Thick Gasket – 350 500 Unit Twin (0.045″)
This extra thick, Buna impregnated, primary gasket for Triumph 350 & 500 unit twins will compensate for where you have slight scratches and warping in your primary gasket face. Will fit 1957-74 unit 350 and 500 twins including T90, 3TA, T100, T100C, T100R, TR5T Tiger, Trophy, Daytona, etc.
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.













Anonymous (verified owner) –
Gasket has not leaked at all since installation. Good product!