The high flow, fabricated aluminum air intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly increases air flow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the inner fender. All aluminum construction features large diameter 4" piping with smooth aerodynamic bends to improve intake air velocity, volume, and provide more aggressive engine and turbo sound during acceleration. Removable air box lid element allows for easy visual inspection and maintenance of your WCFab filter with included hydrophobic pre-filter cover, to help keep your MAF sensor, turbo, and engine airways contaminant free. Air box is constructed of 10G aluminum sheet. Includes High Flow 4 in. Turbo Intake Horn which removes restrictions in the OEM setup to improve turbo spool and top end power. This High Flow 4 in. horn is fully compatible with OEM and upgraded drop in IHI style turbochargers. Kit includes upgraded high quality silicone boots that withstand higher pressures and temperatures than the failure prone, angled factory parts to increase reliability and help eliminate boost leaks. Includes Fuel Pressure Regulator Valve (FPRV) Block Off Kit to allow proper clearance to larger diameter Y-Bridge assembly. The 3" High Flow Down Pipe is a straight shot compared to the crushed spots and curves on the factory down pipe, which helps improve exhaust flow and reduces under hood temps. Finished in Black Ceramic Coat with Heat Wrap. Full assembly finished in your choice of WCFab's signature custom powder coat colors for a look as unique as your truck. Save up to $127.00 versus buying components individually.. WCFab 2001-2004 GM LB7 6.6L Duramax Stage 3 High Flow Intake Bundle Kit Stage 3 upgrade for the 2001-2004 LB7 Duramax combines the Stage 1 High Flow Bundle, Stage 2 Intake Kit, and 3" Down Pipe into a single package providing increased airflow for your turbo and engine for improved efficiency, throttle response, and turbo spool up. This kit replaces the restrictive OEM LB7 Y-Bridge, passenger side intercooler pipe, and driver side intercooler pipe with a high flow, 3 mandrel bent aluminum piping kit feeding WCFab's signature TIG welded, CNC machined billet y-bridge base to help increase throttle response, turbo spool up, and reduce EGTs by creating a full 3" intake tract between your turbo and engine.. NOTE: NOT RECOMMENDED FOR USE WITH S300 OR S400 STYLE TURBOCHARGERS. If you are planning to run a turbo other than an OEM / IHI style upgraded drop in on your setup, please check out S300 Single Turbo Kit WCF100478 and S400 Single Turbo Kit WCF100489 or call for help placing your order.. Wehrli Custom Fab High Flow Bundle Intake Kit Stage 3, 01-04 Duramax LB7, Chevy Orange. Wehrli 01-04 Chevrolet 6.6L LB7 Duramax High Flow Intake Bundle Kit - Chevy Orange. High Flow Bundle Intake Kit Stage 3, 01-04 D-Max LB7, Chevy Orange. High Quality Silicone Boots and Stainless Steel T-Bolt Clamps. Kit includes: WCF100693, WCF100300, WCF100349, WCF100119.. Dry Air Filter with Outerwears Pre-Filter Cover. Hi Flo Kit Stage 3 01-04 Dmax Chevy Oran. Installation Hardware and Gaskets. Durable Custom Powder Coat Finish. 3" Fabricated Billet Y-Bridge. 3" Cold Side Intercooler Pipe. 3" Hot Side Intercooler Pipe. 4" Intake with Air Box. Intercooler Pipe Set. Hi Flo S3 01-04 CRO. 3" Turbo Downpipe. 4" Intake Horn

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