# S&S Cycle 66-78 BT Complete 74in Top End Replacement Kit

Provide everything you need to replace the top end of a 74" shovelhead engine. Includes a set of S&S Super Stock® cylinder heads, a pair of S&S® stock bore cylinders (37/16" for 74" and 31/2" for 80"), S&S 8:1 compression forged pistons, complete with rings and wristpins, manifold clamps, manifold seals, all required hardware, and gaskets.

-   74" top end kits include S&S 106-5495 series 331/32" stroke pistons and o-ring style cylinder heads

This Part Fits:

Year

Make

Model

Submodel

1977-1978

Harley-Davidson

FXS Low Rider

Base

## Details

- **Price:** 5241.57 CAD
- **Vendor:** S&S Cycle
- **Type:** Heads

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5241.57 CAD | In stock |

## Images

- Photo - Primary
- User 1

---

> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-66-78-bt-complete-74in-top-end-replacement-kit)
> Updated: 2026-07-13