Screamin’ Eagle® 135ci Stage IV Crate Engine – 144 HP Performance Upgrade for Touring Models

Unleash the beast with the most powerful street-compliant crate engine Harley-Davidson has ever built. The Screamin’ Eagle® 135ci Crate Engine is engineered for riders who demand maximum performance, high RPM power, and no compromises. Delivering a massive 144 horsepower and 149 ft-lb of torque directly to the rear wheel, this engine is the ultimate upgrade for Touring enthusiasts and adrenaline junkies alike.

Crafted by the Harley-Davidson® experts in Milwaukee, this factory-assembled engine is packed with race-proven components inspired by the King of the Baggers championship-winning machines. Whether you’re charging the highway or tearing up the track, this crate engine is your ticket to dominant performance and show-stopping style.

🔧 Key Features:

• Power & Displacement: 135 cubic inches of high-compression muscle (11.6:1 ratio) – our largest and most powerful street-legal crate engine.

• Race-Inspired Engineering: CNC-ported cylinder heads, SE8-550 cam, 68mm throttle body, forged pistons, and Extreme Flow intake manifold.

• Screamin’ Eagle® Pro Components: Includes billet cam plate, high-performance oil pump, tappets, and performance cam bearing.

• High-Flow Fuel Delivery: Equipped with 6.8 g/sec injectors for max combustion efficiency.

• Show-Quality Finish: Striking Black Granite with Chrome accents, exclusive 135 and Stage IV badging.

• Bolt-In Fitment: Designed for OE-style Touring frames – no special fabrication or engine mount relocation required.

• Made in Milwaukee: Factory-assembled at Harley-Davidson’s Powertrain Operations facility.

📦 What’s Included:

• Screamin’ Eagle® 135ci Crate Engine

• Gloss-black 68mm intake manifold and CNC-ported heads

• Screamin’ Eagle high-lift cam, flywheel, fuel injectors, and pistons

• Installation hardware & instructions

✅ Product Fitment:

Compatible with:

• ‘23-later FLHXSE / FLTRXSE

• ‘24-later FLHX / FLTRX / FLTRXSTSE

📌 Note:

• Requires Head Pipe P/N 65600177 (sold separately)

• ‘23–‘24 models require Cylinder Head Retrofit Kit P/N 29900147 (sold separately)

• ECM recalibration required using Screamin’ Eagle Pro Street Tuner

• Not compatible with California models

🔒 Street Compliance:

• 49-State U.S. EPA Compliant

• Not legal for use on pollution-controlled vehicles in California

⚠️ Use of performance parts may be limited to closed-course competition. Always follow local emission laws.

💡 Why Choose Screamin’ Eagle® 135ci?

This isn’t just an upgrade — it’s a revolution. Whether you’re chasing lap times, passing on the open road, or dominating bike nights, the Screamin’ Eagle 135ci Crate Engine transforms your Harley into a performance monster. Built for experienced riders ready to unlock the true potential of their machine.