{"product_id":"apr-07-08-audi-rs4-4-2l-fsi-high-pressure-fuel-pumps-rebuilds","title":"APR 07-08 Audi RS4 4.2L FSI High Pressure Fuel Pumps - Rebuilds","description":"\u003cp\u003eThe HPFP internals must be machined to extreme tolerances and installed in a clean environment or the pump can easily fail. Dimensional tolerances on the APR HPFP are as tight as .00004\" and geometric tolerances are as tight as .00005\". The plunger and barrel are created from certified and heat-treated bearing-grade stainless steel and the plunger undergoes a special diamond like coating process for exceptional surfaces hardness and ultra-reliable operation. To prevent float associated with altering the plunger's mass, APR supplies each unit with a properly specified spring. All internal seals are replaced, including the spring seal, and the tip of the pump retains the factory pivoting head to reduce cam follower wear and piston side loading.\u003c\/p\u003e\u003ch4\u003eFeatures and Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDramatically increases the volume of fuel displaced by the HPFP by 41%\u003c\/li\u003e\n\u003cli\u003eMaintains higher pressures under demanding situations\u003c\/li\u003e\n\u003cli\u003eFully rebuilt in house\u003c\/li\u003e\n\u003cli\u003eFully machine tested and broken in before shipping\u003c\/li\u003e\n\u003cli\u003eRebuilds your factory pumps\u003c\/li\u003e\n\u003cli\u003eUpgraded and weight matched spring\u003c\/li\u003e\n\u003cli\u003eDLC coated piston\u003c\/li\u003e\n\u003cli\u003eHeat-treated bearing-grade stainless steel material\u003c\/li\u003e\n\u003cli\u003eSupports big power\u003c\/li\u003e\n\u003cli\u003e.00004\" dimensional tolerances\u003c\/li\u003e\n\u003cli\u003e.00005\" geometrical tolerances\u003c\/li\u003e\n\u003cli\u003eSpring seals replaced\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"APR","offers":[{"title":"Default Title","offer_id":44433481269347,"sku":"MS100073","price":4662.63,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/8848\/2659\/files\/MS100073_1.jpg?v=1785729681","url":"https:\/\/www.speedscience.co.nz\/products\/apr-07-08-audi-rs4-4-2l-fsi-high-pressure-fuel-pumps-rebuilds","provider":"Speed Science","version":"1.0","type":"link"}