The Buckshot Racing #77 Carburetor (Carb) Velocity Stacks feature precision machined lightweight 6061 billet aluminum with a high flow velocity stack design, allowing for improved horsepower and improved air-fuel delivery to the engine over the stock airbox.
 
The replace the no longer available (NLA) Mercury Racing cast aluminum one-piece CARB PLATE ASSY OEM Part #13443A1 (MSRP $279) found on the SST-120, SST-140, F1, F200, 2.0, 2.4, and 2.5 Liter race outboards running in UIM, APBA and  OPC.
 
These replaces the airbox on all carbureted Mercury V6 (135, 150, Black Max, XR2, XR4, XR6, 175 HP, 200 HP, 245 HP, and all 3.0 Liters) with WH, WMV, or WMH carbs manufactured between 1976 and 2005. 
 
Our separate mount plates (vs the factory part) provide easier access while jetting and removing single carburetors.
 
Set of three (3) Buckshot Racing #77 Carburetor (Carb) Velocity Stacks available in hard black anodized.
 
Why Buckshot Carb Stacks?
1) Highest quality design, CNC machining, and finish (see below)!
2) Best Performance; 1) overcut to allow for stable atmospheric pressure to the idle circuits, 2) bridge to allow for dual air sharing, 3) Center Pull carb caps are optional to keep your motor clean.
3) We want to support the community with the best price on the market.
 
7 disciplines we employ on every Billet part!

1. We select and use high-quality cutting tools designed for aluminum machining to minimize tool wear and achieve a smooth finish.
 
2. We work to optimize speeds and feeds, adjusting cutting speeds and feed rates to achieve the optimal balance between material removal and surface finish. 
 
3. We employ coolant or lubricant to dissipate heat and reduce friction during machining, which helps prevent tool overheating and improves surface finish.
 
4. We ensure our tool runout is minimized to reduce vibration and chatter, which can negatively impact surface finish.
 
5. We implement proper tool paths including climb milling, to minimize tool deflection and achieve a better surface finish.
 
6. We perfect ramping, profiling, or contouring to find the most suitable approach for each part.
 
7. We properly calibrate and align our CNN machines to achieve accurate cuts, which enhances surface finish. This includes inspecting and maintaining utilized CNC machines and tooling to ensure optimal machining every run. 
 
These Made in the USA practices have helped us enhance the precision and the surface finish of our Buckshot Racing #77 Speed Store CNC machined 6061 aluminum billet parts, to the highest level.