Knuckle Sandwich 400/400

🔥 Knuckle Sandwich 400/400 Race-Ready Compound Turbo Kit – 1450+ HP Capable

Ready to throw a knockout punch? The Knuckle Sandwich 400/400 compound turbo kit is built for diesel racers and serious street enthusiasts pushing their builds to the limit. Featuring a massive S485/96/T6 5Blade high-pressure turbo and a lightning-quick spooling S472/87/T4 5Blade low-pressure charger, this setup supports up to 1450+ HP while maintaining excellent drivability on 6.4L and 6.7L Cummins engines.

Crafted with high-strength CNC-machined flanges and aluminized mild steel piping, every component is TIG-welded and built on exact-engine jigs for perfect fitment. This is the same battle-tested twin setup trusted by diesel racers nationwide.

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🧰 Turbocharger Specs:

• High-Pressure Turbo: S485/96mm, T6 flange, 5Blade Mafia™

• Atmospheric Turbo: S472/87mm, T4 flange, 5Blade Mafia™

• Includes: CNC’d T4 1.00" Spacer & Heavy-Duty S400 Turbo Mounting Bracket

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💪 What’s Included:

• 5x12 High-Flow S&B Air Filter with Power Cone

• 5.00" Air Cleaner Pipe & 5.00"–5.50" Silicone Boot w/ T-Bolt Clamps

• 3.50"–5.50" Silicone Reducer w/ T-Bolt Clamps

• Optional 4.00" or 5.00" Downpipe

• Braided Stainless Steel High-Temp Oil Supply Lines + Fittings

• Oil Drain Lines & Gaskets

• Optional Spring Wastegate Actuator (for S300)

• Turbo Mounting Studs & Nuts

• High Torque T-Bolt Clamps

• V-Band Clamps

• 3.00" Bead-Rolled Intercooler Pipe

• 3.50" 1-Piece Cold Pipe w/ O-Ring Flange, Bead-Rolling & 1/8" NPT Boost Port

• Hot Pipe w/ Short Stretch Technology, Heat Insulation & CNC’d Flanges

• Water Relocation Line w/ Fittings

• Stainless Diesel 5-Layer Extreme Duty Boots

• High-Quality Powder Coat Finish (Custom Color Options Available)

• Full Installation Instructions with Photos

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⚙️ Why Choose the Knuckle Sandwich Twin Kit?

• Built to handle 100+ PSI boost pressure reliably

• CNC’d components for unmatched fitment

• TIG-welded, mandrel-bent piping for strength & flow

• Designed for serious performance without compromising drivability

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💥 Built for War. Styled for You.

Whether you're chasing the podium or just want to dominate the street, the Knuckle Sandwich 400/400 delivers brutal airflow with refined engineering. Choose your powder coat color and build your dream setup today. This is more than a compound kit — it’s your ticket to four-digit horsepower domination.