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:
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High-Pressure Turbo: S485/96mm, T6 flange, 5Blade Mafia™
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Atmospheric Turbo: S472/87mm, T4 flange, 5Blade Mafia™
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Includes: CNC’d T4 1.00" Spacer & Heavy-Duty S400 Turbo Mounting Bracket
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💪 What’s Included:
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5x12 High-Flow S&B Air Filter with Power Cone
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5.00" Air Cleaner Pipe & 5.00"–5.50" Silicone Boot w/ T-Bolt Clamps
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3.50"–5.50" Silicone Reducer w/ T-Bolt Clamps
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Optional 4.00" or 5.00" Downpipe
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Braided Stainless Steel High-Temp Oil Supply Lines + Fittings
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Oil Drain Lines & Gaskets
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Optional Spring Wastegate Actuator (for S300)
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Turbo Mounting Studs & Nuts
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High Torque T-Bolt Clamps
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V-Band Clamps
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3.00" Bead-Rolled Intercooler Pipe
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3.50" 1-Piece Cold Pipe w/ O-Ring Flange, Bead-Rolling & 1/8" NPT Boost Port
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Hot Pipe w/ Short Stretch Technology, Heat Insulation & CNC’d Flanges
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Water Relocation Line w/ Fittings
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Stainless Diesel 5-Layer Extreme Duty Boots
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High-Quality Powder Coat Finish (Custom Color Options Available)
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Full Installation Instructions with Photos
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⚙️ Why Choose the Knuckle Sandwich Twin Kit?
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Built to handle 100+ PSI boost pressure reliably
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CNC’d components for unmatched fitment
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TIG-welded, mandrel-bent piping for strength & flow
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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.
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Ships within 1-2 business days.
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Knuckle Sandwich 400/400
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FAQs
Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like Turbo Tech Performance. Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.