6.6L LLY (2004.5-2005) Duramax

🔥 4.00" to 5.50" Silicone Reducer Boot – 4.00" Long, 5-Ply High-Temp Reinforced for Diesel Boost Applications This heavy-duty 4.00" ID to 5.50" ID silicone reducer boot is engineered for extreme boost, high heat, and the rigorous demands of diesel performance. With a 4.00"...

🛠 3.50" Mandrel Bent 90° Pipe – Aluminized Mild Steel Perfect for custom turbo piping, exhaust fabrication, or intercooler setups, this high-quality 90° bend is made from 16-gauge (.065" wall) aluminized mild steel for durability and corrosion resistance. Mandrel bent for smooth, unrestricted flow....

🛠️ Silver Velcro Heat Shield – 18" Aluminum-Kevlar Sleeve for Turbo Area Wiring Protection Protect your wiring and hoses from extreme turbo heat with this Silver Velcro Heat Shield Sleeve. Constructed from durable aluminum and Kevlar®-lined material, this 18.00" pre-cut sleeve offers easy installation and premium...

🛠️ Stainless Steel Pre-Formed Exhaust Clamp – Simple, Secure Pipe Connection Looking for a fast, reliable way to connect exhaust pipes without the hassle of cutting or separating components? Our Stainless Steel Pre-Formed Exhaust Clamp is the smart solution for joining exhaust system sections with a tight,...

🛠️ 2-Piece Cold Pipe Fabrication Kit – 3.50" | O-Ring Sealed | Optional Coating & Clamp This 2-Piece Cold Pipe Kit is designed for performance turbo builds that require precision fitment during fabrication. Engineered as a modular two-piece assembly, it allows easier alignment and clocking during install—making...

🔥 3.50" to 4.00" Silicone Reducer Boot – 4.00" Long, 5-Ply Reinforced for Diesel Boost Applications This premium 3.50" ID to 4.00" ID silicone reducer boot is engineered for high-boost diesel and performance applications where durability, flexibility, and a leak-free seal are critical. At...

🛠 4.00" Downpipe for S400 Turbo – Twin Turbo Applications (Non-Returnable) This 4.00" downpipe is specifically designed for use with S400 turbochargers in twin turbo (compound) configurations. Built for high-flow performance and tight engine bay clearance, it’s an essential component for custom compound diesel...

Duramax Turbo Installation Gasket Kit – Fits 2004.5–2010 LLY, LBZ & LMM Engines Ensure a leak-free, trouble-free turbo install with this complete turbo installation gasket kit for 2004.5–2010 Duramax diesel engines, including LLY, LBZ, and LMM models. Whether you're installing a brand-new stock turbo or upgrading to...

🔥 Turbosmart BOV Controller Kit – Protect Your Turbo & Eliminate Compressor Surge (Diesel Application) The Turbosmart BOV Controller Kit is an advanced electronic solution designed specifically to prevent compressor surge in large turbo diesel engines. Engineered to manage high-boost systems, this BOV controller...

🛠️ 4.00" to 5.00" Exhaust Installation Kit – Stainless Flex + Clamps + Reducer | Ideal for 2G Swaps Make your turbo swap exhaust install quick and hassle-free with this 4.00" to 5.00" Exhaust Installation Kit. Perfect for 2nd Gen turbo swap applications, this kit includes...

  🛠 4.00" Mandrel Bent 90° Pipe – Aluminized Mild Steel (16 Gauge) This high-flow 4.00" mandrel bent 90-degree pipe is perfect for fabricators building custom turbo systems, downpipes, or exhaust components. Made from 16-gauge (.065" wall) aluminized mild steel, it offers durability, easy...

🛠️ Boost Leak Tester Kit – Protect Your Turbo | Includes 45° Elbow & Air Fitting Installing a new turbo or building a fresh setup? Don’t skip one of the most important steps in turbocharger health—boost leak testing. This Boost Leak Tester Kit helps...

🔥 3.50" to 5.50" Silicone Reducer Boot – 4.00" Long, 5-Ply High-Temp Reinforced for Diesel Boost Applications This heavy-duty 3.50" ID to 5.50" ID silicone reducer boot is engineered for serious performance. Built from 5-ply reinforced high-temperature silicone, it’s strength-tested to withstand the extreme...

🔧 Boost Leak Tester Kit – Universal Turbo Inlet Tool with Billet Plug, Silicone Boot & T-Bolt Clamps Ensure your turbocharged system is running at peak performance with our Boost Leak Tester Kit. The best way to detect boost leaks is by pressurizing the...

🔧 Universal Boost Leak Tester Kit – Billet Plug, Silicone Coupler & T-Bolt Clamps | Turbo Inlet Pressure Test Tool Eliminate hidden performance loss and increase power by tracking down boost leaks the right way. Our Universal Boost Leak Tester Kit is the most...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...

S&S Upgrades Proprietary nozzle honing process for clean and consistent holes Nozzles flow-matched to 1% variance per set, using OE standards Viscor SAE-J967 40 degrees C 100 bar Injectors flow-matched to 3% variance per set Viscor SAE-J967 40 degrees C 4 different pressure/energizing points...