Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Engines and Components› Cylinder Heads and Components
S&S Cycle
S&S Cycle 99-05 BT Super Stock 79cc Cylinder Head Kit - Silver
SKU: S0GE 900-0254
Moderate — 2–4 hours
Overview
Show original supplier description
Part #: 900-0254
These S&S (R) Super Stock (R) high performance cylinder heads are designed for 1999-'05 engines with stock crankcase. They work well with engines of stock displacement, but are ideal for somewhat larger stroker or big bore engines up to 110". The 79cc combustion chamber provides a slightly higher than stock, which makes most performance cams work better. Not machined for S&S (R) compression releases. The large 1.940" intake and 1.575" exhaust valves maintain port velecity for good low and midrange response, but supply enough air for stock and slightly larger engines to perform to their full potential. S&S (R) High performance valve springs allow the installation of camshafts with up to .585" lift. Compatible with stock rocker boxes, exhaust, and intake manifolds.
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | S&S Cycle |
| Part Number | S0GE 900-0254 |
Videos
S&S Big Bore Kits and Cylinder Heads for Harley Review at RevZilla.com
S&S Cycle - Twin Cam Head Breathers
Harley 106ci S&S Big Bore with 585 S&S Easy Start Cams - First Start-up - Maineyak
Harley Dyno Tune 95ci Big Bore Twin Cam S&S MR103 Dyna FXDX
S&S Cycle - TC3 Oil Pump & Cam Plate - Test Vs. Stock
S&S Cycle Product Spotlight - Power Packages for HD® Twin Cam & M8 Models
Harley Cam Plate Tech - The M8 TC Cam Plate Debate - S&S Cycle - Kevin Baxter - Pro Twin Performance
WHY I DONT LIKE THE S&S CAM PLATE
How to Install: S&S Cycle Power Package (Part 2) Cam Chest Kit
How to Install: S&S Cycle Winter Power Pack (Part 1) Big Bore Kit
110ci Harley Davidson Twin Cam engine build (S&S cycle big bore kit w/ Woods 999 CAMSHAFTS!)
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy