Why fit APR High Pressure Fuel Pumps for B7 RS4?

A supercharged or turbocharged RS4 can ask for more fuel than the factory pumps supply, especially in the low and mid range. The APR High Pressure Fuel Pumps for B7 RS4 each deliver 41 percent more fuel volume, keeping rail pressure steady when demand peaks.

Does the APR RS4 pump set include both pumps?

Yes. The 4.2 FSI V8 uses two high pressure pumps, and this set includes both. Each one is built on a new factory pump with the APR internals, then tested and broken in on a rig before shipping, so there is nothing to send away.

Do the APR 4.2 FSI pumps raise fuel pressure?

Not as their main job. Despite the name, the upgrade raises the volume of fuel each pump can deliver by 41 percent. That keeps rail pressure from dropping under heavy demand, rather than raising the pressure target set by the calibration.

Do I need the APR RS4 fuel pumps on a stock engine?

Usually not. APR aims this upgrade at forced induction builds, where a supercharger or turbo system pushes fuel demand past what the factory pumps supply. If your RS4 is naturally aspirated, contact us before ordering and we will help you decide whether it is needed.

How are the APR B7 RS4 pumps built?

APR fits a bearing grade stainless plunger and barrel, a DLC coated plunger, weight matched springs and new seals, holding tolerances to 0.00004 inch. The factory pivoting head is kept to reduce cam follower wear, and each pump is tested on a rig.

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Description

APR High Pressure Fuel Pumps for B7 RS4 4.2 FSI V8

The APR High Pressure Fuel Pumps for B7 RS4 replace both factory direct injection pumps on the 4.2 FSI V8 with upgraded units that each deliver 41 percent more fuel volume. The 4.2 FSI V8 runs two cam driven high pressure pumps, and an upgraded supercharger or turbocharger system can ask for more fuel than they supply, especially in the low and mid range. The APR pumps keep rail pressure steady when demand peaks, which makes them a core part of a forced induction RS4 build. This set is supplied on new factory pumps, so there is nothing to send away.

How APR Builds the Pumps

APR bores out each pump to increase displacement, fitting a heat treated, bearing grade stainless plunger and barrel with a diamond like carbon coated plunger. Tolerances are held to 0.00004 inch dimensional and 0.00005 inch geometric, a weight matched spring prevents float, all internal seals including the spring seal are replaced, and the factory pivoting head is kept to reduce cam follower wear and side loading. Each pump is tested and broken in on a rig.

Features

Pair of upgraded pumps for the 4.2 FSI V8
41 percent more fuel volume per pump
Supplied on new factory pumps
DLC coated plunger, bearing grade stainless plunger and barrel
Weight matched springs, all seals replaced
Machine tested and broken in before shipping

Applications

Audi RS4: B7 | 2007-2008 | 4.2L FSI V8

Notes

The High Pressure Fuel Pumps for B7 RS4 supply extra fuel volume for forced induction builds; the gain depends on the supercharger or turbo system and calibration

Frequently Asked Questions

Why fit APR High Pressure Fuel Pumps for B7 RS4? A supercharged or turbocharged RS4 can ask for more fuel than the factory pumps supply, especially in the low and mid range. The APR High Pressure Fuel Pumps for B7 RS4 each deliver 41 percent more fuel volume, keeping rail pressure steady when demand peaks.
Does the APR RS4 pump set include both pumps? Yes. The 4.2 FSI V8 uses two high pressure pumps, and this set includes both. Each one is built on a new factory pump with the APR internals, then tested and broken in on a rig before shipping, so there is nothing to send away.
Do the APR 4.2 FSI pumps raise fuel pressure? Not as their main job. Despite the name, the upgrade raises the volume of fuel each pump can deliver by 41 percent. That keeps rail pressure from dropping under heavy demand, rather than raising the pressure target set by the calibration.
Do I need the APR RS4 fuel pumps on a stock engine? Usually not. APR aims this upgrade at forced induction builds, where a supercharger or turbo system pushes fuel demand past what the factory pumps supply. If your RS4 is naturally aspirated, contact us before ordering and we will help you decide whether it is needed.
How are the APR B7 RS4 pumps built? APR fits a bearing grade stainless plunger and barrel, a DLC coated plunger, weight matched springs and new seals, holding tolerances to 0.00004 inch. The factory pivoting head is kept to reduce cam follower wear, and each pump is tested on a rig.

About APR Tuning

APR was founded in 1997 and develops performance hardware, software and calibrations for Volkswagen, Audi, SEAT, Skoda and Porsche vehicles, from intakes, intercoolers and turbocharger systems to exhausts, brakes and suspension. It designs and manufactures from an 80,000 square foot headquarters in Opelika, Alabama, which it shares with Dinan as part of Holley Performance Brands, and delivers its software worldwide through a 24-hour automated system run from the same site.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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APR High Pressure Fuel Pumps for B7 RS4 4.2 FSI V8 [MS100072]

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APR High Pressure Fuel Pumps for B7 RS4 4.2 FSI V8

How APR Builds the Pumps

Features

Applications

Notes

Frequently Asked Questions

About APR Tuning

Reviews