Athena S410195006011 Cylinder base gasket FR/RR .015" RCS – HD Evo BT 84-99

Reliable Seal and Performance with Athena S410195006011 Cylinder Base Gasket FR/RR .015" RCS – HD Evo BT 84-99

Keep your Harley-Davidson Evo BT engine running smooth and leak-free with the Athena S410195006011 Cylinder base gasket FR/RR .015" RCS – HD Evo BT 84-99. This gasket ensures a perfect seal between the cylinder and engine base, preventing oil and compression leaks that can hurt performance. Designed specifically for front and rear cylinders on 1984-1999 Harley Evo Big Twins, it offers a precise fit that saves you time and money on repairs.

Features and Benefits of Athena S410195006011 Cylinder Base Gasket FR/RR .015" RCS – HD Evo BT 84-99

• Exact Thickness: .015" thickness ensures optimal compression and sealing for your engine.
• Durable Material: Crafted from advanced composite materials that resist heat and wear.
• Perfect Fit: Engineered specifically for Harley-Davidson Evo Big Twin models from 1984 to 1999.
• Leak Prevention: Stops oil and gas leaks, maintaining engine efficiency and reducing maintenance costs.
• Easy Installation: Designed for hassle-free replacement, saving you time in the garage.

With Athena’s trusted engineering, this gasket delivers long-lasting durability and consistent engine performance. It’s an affordable upgrade that keeps your ride running strong without breaking the bank. Whether you’re rebuilding or maintaining your Evo Big Twin, this gasket is a smart choice for reliable sealing and peace of mind.

3-1/2" bore. Front/rear. Type 'A'. 0.4mm (.015)" RCS (Rubber Coated Steel). Gasket with an embossed steel core with a .001" thick coating of heat resistant nitrile rubber on both sides. OEM replacement reference 16774-86C, 16774-86D, 16789-04. Note: Type 'A' and 'B' Evolution base gaskets explained. There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we call them 'type A' (early style) and 'type B' (late style). - Type A' gasket: Was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contours of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. - Type B' gasket: Was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The 'type B' is the only gasket type that 'The Factory' supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the 'A' & 'B' gaskets is the outside perimeter.