Engine Upgrades
BD Diesel Screamer Turbo (1045840) for 2004.5-2010 Duramax LLY/LBZ/LMM
The drop-in, stock-appearing Screamer turbo for the 2004.5-2016 Duramax utilizes modern turbo technology that delivers increased airflow without compromising on low end response. Boost pressure can be increased to improve horsepower potential.
Mahle De-Lipped Cast Piston Set (MLE930036055) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML
$1,704.14If you’re rebuilding your 6.6L Duramax and want a piston set that blends proven reliability with performance-ready upgrades, the Mahle De-Lipped Cast Piston Set is the way to go. These aren’t your average cast pistons, they’re engineered to go the distance and built to handle the kind of abuse that comes with towing heavy, hauling hard, or chasing big power.
WAGLER CONNECTING ROD SET (WCPCRC6.6) for 2001-2016 DURAMAX LB7 / LLY / LBZ / LMM / LML
$3,200.00Enhance the performance and durability of your 2001-2016 GM 6.6L Duramax engine with the top-of-the-line Wagler WCPCRC6.6 Connecting Rod Set. Crafted with precision and excellence in mind, these connecting rods are a testament to Wagler Competition Products’ commitment to quality and innovation.
ARP Head Studs (ARP230-4201) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML
$837.29ARP cylinder head studs are the clear favorite among top professional engine builders in nearly every form of motor sports. ARP uses a premium grade 8740 alloy that is rated superior to aircraft quality. Then each stud is specially heat treated in a vertical fixture that insures complete heat penetration.
Fleece 1″ T4 Pedestal Spacer (FPE-T4PED-SPACER1.0) for Duramax equipped w/T4 Turbos
The Fleece 1″ T4 Pedestal Spacer (FPE-T4PED-SPACER1.0) is a high-quality component designed for Duramax engines with T4 turbochargers. It raises the turbo pedestal by one inch to allow clearance for larger or custom turbos, ensuring proper alignment and secure mounting. Ideal for performance upgrades and custom builds, it enhances compatibility and flexibility in turbo system modifications.
Fleece Multiuse Sensor Pigtail No 11 (FPE-HAR-MU-PT-11) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML
The Fleece Multiuse Sensor Pigtail No. 11 (FPE-HAR-MU-PT-11) is a durable, OEM-style replacement wiring solution for 2001–2016 Duramax diesel engines (LB7, LLY, LBZ, LMM, LML). Designed for easy installation and reliable sensor connections, it helps maintain proper engine management. Made from automotive-grade materials, it offers long-lasting performance in tough conditions and is ideal for replacing damaged connectors or custom wiring upgrades.
Fleece Vane Position Sensor Pigtail (FPE-HAR-DMAX-VPS-0405) for 2004.5-2005 LLY
The Fleece Vane Position Sensor Pigtail (FPE-HAR-DMAX-VPS-0405) is a durable, plug-and-play replacement wiring harness for 2004.5-2005 GM Duramax LLY engines. Designed to replace damaged or corroded vane position sensor connectors, it ensures proper turbocharger function and engine performance. Featuring OEM-style connectors, it provides a reliable electrical connection, eliminates turbo-related error codes, and is built to withstand harsh diesel engine conditions.
Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0310) for 2003-2010 Duramax LB7 / LLY / LBZ / LMM
The Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0310) is a durable, OEM-style replacement harness for 2003–2010 GM Duramax diesel engines (LB7, LLY, LBZ, LMM). It repairs damaged or corroded oil pressure sensor connectors, ensuring accurate pressure readings and proper engine function. Designed for a secure, weather-resistant fit, it provides a reliable and cost-effective solution for maintenance or troubleshooting.
Fleece MAP BARO Sensor Pigtail (FPE-HAR-DMAX-MAP-0107) for 2001-2007 Duramax LB7 / LLY / LBZ
The Fleece MAP BARO Sensor Pigtail (FPE-HAR-DMAX-MAP-0107) is a direct-fit replacement connector for 2001–2007 GM Duramax diesel engines (LB7, LLY, LBZ). Designed to replace damaged or corroded MAP or BARO sensor connectors, it features OEM-style construction and durable wiring for reliable performance in harsh engine conditions. Ideal for maintenance, repairs, or troubleshooting.
Fleece Crankshaft Position Sensor Pigtail (FPE-HAR-DMAX-CPS-0416) for 2004.5-2016 Duramax LLY / LBZ / LMM / LML
The Fleece Crankshaft Position Sensor Pigtail (FPE-HAR-DMAX-CPS-0416) is a durable, direct-fit replacement harness for 2004.5–2016 GM Duramax diesel engines (LLY, LBZ, LMM, LML). Made with OEM-style connectors and automotive-grade wiring, it repairs damaged crankshaft position sensor connectors to restore accurate engine timing and performance, helping prevent misfires, hard starts, and error codes.
Replaces PT2547 and AC Delco 13576413
Fleece Performance Billet Oil Cap Red (FPE-DMAX-OC-RED) for 2001-2016 Duramax LB7 / LLY / LBZ
The Fleece Performance Billet Oil Cap Red (FPE-DMAX-OC-RED) is a high-quality aftermarket upgrade for 2001–2016 GM Duramax diesel engines (LB7, LLY, LBZ). Made from durable billet aluminum with a red anodized finish, it offers a secure fit, corrosion resistance, and enhanced engine bay aesthetics—combining style and function for Duramax owners.
Fleece Performance Billet Oil Cap Blue (FPE-DMAX-OC-BLU) for 2001-2016 Duramax LB7 / LLY / LBZ
The Fleece Performance Billet Oil Cap Blue (FPE-DMAX-OC-BLU) is a durable, anodized aluminum upgrade for 2001–2016 GM Duramax diesel engines (LB7, LLY, LBZ). It offers a secure, leak-free seal and enhances engine bay aesthetics with its vibrant blue finish. Designed for a precise fit, it replaces the factory cap with a corrosion-resistant, high-performance alternative ideal for diesel enthusiasts seeking improved function and style.
Fleece Performance Billet Oil Cap Black (FPE-DMAX-OC-BLK) for 2001-2016 Duramax LB7 / LLY / LBZ
The Fleece Performance Billet Oil Cap Black (FPE-DMAX-OC-BLK) is a durable, high-quality aluminum replacement for 2001–2016 GM Duramax diesel engines. It features a sleek black anodized finish for corrosion resistance and improved aesthetics. Designed for a perfect fit, it ensures a secure seal to maintain oil pressure and prevent leaks, making it ideal for both performance enthusiasts and daily drivers.
Fleece Rocker Bridges (FPE-BRAB-D1) for 2001-2016 Duramax LP7 / LLY / LBZ / LMM / LML
The Fleece Rocker Bridges (FPE-BRAB-D1) are high-strength, precision components designed for 2001–2016 GM Duramax diesel engines (LB7, LLY, LBZ, LMM, LML). They enhance valvetrain stability and durability, making them ideal for high-performance or heavy-duty applications. Built to OEM specifications, these direct-fit bridges reduce engine wear, maintain proper valve geometry, and are compatible with both factory and aftermarket rocker arms.
Sinister Diesel Valve Cover Gasket Kit (SDVCKFGM045) For 2004-2010 Duramax 6.6L
Sinister Diesel offers high-quality valve cover gaskets for light and medium-duty diesel engines, including Ford Power Stroke, Dodge Cummins, and GM Duramax models. Made primarily in the USA, these gaskets use premium synthetic rubber compounds like high-temperature silicone and Fluoroelastomer (FKM) for superior sealing and heat resistance compared to lower-quality offshore alternatives.
Sinister Diesel Edition Powermax Series 2 Turbo (SDPWRMAX662) for 2004.5-2010 Duramax 6.6L LLY / LBZ / LMM
The Sinister Diesel Powermax Series 2 Turbo features a larger compressor wheel for fast spool, improved horsepower, and sharp throttle response. It uses Garrett’s Advanced Variable Nozzle Turbine for better flow and boost. Built by the original manufacturer with OEM-style housings, it offers a direct fit for GM Duramax engines. The compressor cover is finished in Sinister Blue.
Sinister Diesel Edition Powermax Series 1 Turbo (SDPWRMAX661) for 2004.5-2010 Duramax 6.6L LLY / LBZ / LMM
The Sinister Diesel Powermax Series 1 Turbo features a larger compressor wheel for quick spool, increased horsepower, and sharp throttle response. It uses Garrett’s Advanced Variable Nozzle Turbine design for improved compressor flow and boost. Built by the original manufacturer with OEM-style housings, it ensures a direct fit for GM Duramax engines.
Sinister Diesel PITBULL SERIES® Turbocharger for 2004.5-2010 Duramax 6.6L LLY/LBZ/LMM
The Sinister Diesel PITBULL SERIES® Turbocharger is a high-performance, drop-in upgrade for 2004.5–2010 Chevy and GMC Duramax 6.6L trucks. It retains the factory Variable Geometry Turbo and mounting style for easy installation, improves airflow for up to 690 horsepower, maintains low-end drivability, and reduces both peak exhaust gas temperatures (EGTs) and drive pressure.
Sinister Diesel EGR Cooler (SDEGRCLLY) for 2004.5-2005 Duramax 6.6L LLY
Sinister Diesel has developed a redesigned EGR cooler for the 6.6L LLY Duramax diesel engine, offering the same fit as the factory GM unit but with improved durability and performance. Unlike the factory cooler, which can fail and cause severe engine damage, Sinister Diesel’s version uses high-flow stainless steel tubing and TIG welds instead of brazed internal fins. Each unit is pressure-tested for reliability. This upgraded EGR cooler is compatible with factory GM tuning and aftermarket performance chips without triggering a Check Engine Light. It is a direct-fit replacement for 2004–2005 Chevy and GMC 2500/3500 trucks with the 6.6L LLY Duramax engine.
Sinister Diesel Black Diamond Head Gasket (Pass. A) (SDBD580) for 2001-2010 Duramax 6.6L
Replace blown or leaking head gaskets on your 2001–2010 Duramax LB7, LLY, LBZ, or LMM diesel engine with the Sinister Diesel Black Diamond Head Gasket. Designed for durability, it features a 5-layer stainless steel construction with an FKM coating for a heavy-duty seal that withstands high heat and pressure. Available for both driver’s and passenger’s sides.
All sales are final for clearance items. Only valid while supplies last.
Sinister Diesel High Amp (400A) Wiring Upgrade Kit (SDALTWIRE)
This kit includes all necessary cables to upgrade the alternator charge, alternator ground, and chassis ground. It enhances performance for both stock and high-output alternators up to 400 amps. The cables feature 5285-strand pure copper construction with a 17.2mm diameter and a hyperflex frosted jacket.
Sinister Diesel 320 Amp OEM High Output Alternator (SDALT6601320) for 2001-2007 Duramax 6.6L
The Sinister Diesel 320 Amp OEM alternator is a trusted solution for GM Duramax 6.6L alternator failures, which can cause electronics issues due to low voltage. It features brand-new OEM components for reliability and is a direct fit without modifications. The alternator comes with a 1-year warranty.
Fleece Turbo Compressor Discharge Adapter Kit for S400 Turbos (FPE-S4TCDA-KIT) Universal
The Fleece Turbo Compressor Discharge Adapter Kit (FPE-S4TCDA-KIT) is a durable, high-quality solution for connecting S400 turbochargers to custom intercooler piping. Made from robust, machined aluminum, it ensures optimal airflow and reliable performance under high boost. Its universal design fits a wide range of applications, making it ideal for diesel upgrades and high-performance builds.
AEM 100 PSIg Brass Sensor Kit 1/8 in. NPT Male Thread (30-2131-100)
The AEM 100 PSIg Brass Sensor Kit is a reliable and high-quality product designed for precise pressure readings. The sensor body is made of durable brass material, ensuring long-lasting use and accuracy. The 1/8 inch NPT male thread makes it easy to install in a variety of applications. This kit also includes a 100 PSIg brass sensor connector and pins, providing all the necessary components for a complete and efficient sensor setup. Whether for automotive, industrial, or other uses, this brass sensor kit is a versatile and essential tool for any pressure measurement needs.
