Gap Gang Big Bully Package 136ci Top End Bolt On Kit With 70mm TB And Manifold S And S Injectors Cam Of Choice 170HP

Unleash the full potential of your 136ci Harley with the Gap Gang BIG Bully Package (Top End Only). This is the pinnacle bolt-on top-end upgrade, engineered to transform a strong motor into a low-end torque monster and a high-rpm screamer. If you’re chasing serious horsepower with precise airflow and reliable reliability, this package is built for you.

Two horsepower paths to choose from: when paired with our sauce stock heads, you can expect around 160HP+; for the ultimate top-end flow and power, our Gap Gang performance heads push toward ~170HP+ with the right tune. This package gives you the flexibility to dial in a setup that matches your riding style and performance goals.

What’s included in the Gap Gang BIG Bully Package

• S&S High Compression 136ci Kit — $1,799.99
• 70mm Throttle Body & Manifold — $799.99
• Gap Gang Injectors — tuned fuel delivery for big-bore performance
• Cam of Our Choice — optimized for the 136ci top end
• S&S Quickee Pushrod Kit — precise, race-ready valvetrain alignment
• Gap Gang Heads — $2,199.99
• Optional Upgrade: S&S Cycle Oil Pump & Cam Plate — $999.99

Why this kit stands apart

This isn’t a generic bolt-on package. It’s a carefully choreographed top-end upgrade that aligns high-compression internals, a larger throttle body, and specifically matched heads to deliver real, track-tested horsepower gains. The combination of the S&S high-compression 136ci kit with a 70mm throttle body and manifold unlocks immediate throttle response and a broader power band, so you feel torque from low RPMs and sustained pull through the mid and top end.

The Gap Gang heads are a true differentiator. They’re designed to maximize airflow and combustion efficiency for the 136ci displacement, delivering an extra edge in horsepower when combined with the injectors, cam, and pushrod kit. With this setup, your bike isn’t just faster in a straight line—it accelerates more eagerly, cruises more cleanly, and tunes more predictably across temperatures and fuels.

Who this is for

Ideal for riders who demand serious street- and track-ready performance from a 136ci build: seasoned wrenchers upgrading an existing 136ci platform, hot-rodders chasing robust torque, and riders who want a demonstrable step up in throttle response and horsepower without stepping to a complete engine rebuild.

Practical guidance and use cases

Pair this top-end kit with a proper ECU/tuning solution to realize the full horsepower potential. The 70mm throttle body improves intake velocity and fueling stability at higher RPM, while the Gap Gang heads and injectors ensure your air-fuel mixtures stay optimized under boost. If you’re aiming for peak reliability at higher power, consider the optional oil pump and cam plate upgrade to maintain oil pressure and cam timing precision under load.

Use cases include a street-legal torque monster for daily acceleration, a weekend warrior that hits the dyno, or a track-day setup where every horsepower counts. The packaging is designed to satisfy riders who want big-bore performance without compromising drivability, idle quality, or consistent tuneability across riding conditions.

Note: Installation and tuning should be performed by a qualified technician to ensure optimal performance and reliability for your specific exhaust, fueling, and altitude conditions.