Our premium HPFP internals kit for your Audi 4.0TT V8 engine upgrades both factory high-pressure fuel pumps with performance high-flow internals. Leading-quality components and strict QC process will reliably increase the fuel delivery from your stock fuel system with a set of 11.67mm pistons providing additional fuel support for larger turbos and ethanol fuel.

The 4.0TT's high-pressure fuel pumps supply high-pressure fuel (exceeding 2900psi each) to the direct-injeciton fuel system injectors. When running turbo upgrades, especially with ethanol fuel blends, the stock HPFPs internal volumes become a limiting factor when increasing power. IE's HPFP internals install into your factory pump housings and increase the bore and piston size of the pump internals, allowing more flow, delivering more fuel, and allowing for more horsepower & torque from your hardware and tuning upgrades.

Features:

• Two sets of HPFP internal kits to upgrade your stock pumps
• Reliably adds a larger fuel ceiling for increased flow
• Piston diameters increased to 11.67mm
• Largest stroke volume available
• Broken-in and bench tested on in-house pump dyno
• Constant diameter piston design for long-life operation
• Retains OE spring to avoid increased camshaft wear
• Tool steel DLC coated pin
• Nitrided tool steel cylinder
• Molybdenum disulphide impregnated leak-free seal
• Stainless steel seal body
• Buna-N rubber oil resistant o ring
• Individually tested and verified for extreme tolerances

REQUIRES HPFP ECU SOFTWARE

What's Included:

• Integrated Engineering High Pressure Fuel Pump Upgrade Kit