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Air and Fuel› Fuel Pumps, Regulators and Components
034Motorsport
Fuel Pump, Piston Pair, 4.0T
SKU: 0001 034-106-6052-2
Moderate — 2–4 hours
Overview
Included in this kit are two high-pressure fuel pump piston and cylinder sets. The pistons and cylinders are precision-machined and matched for absolute accuracy, with the pistons and cylinders featuring a DLC coating to reduce friction and enhance performance. The piston diameter is increased from stock 9.98mm to 11.48mm, resulting in a larger area (78.23mm² to 103.51mm²).
Show original supplier description
Part #: 034-106-6052-2
Vehicle Symptoms
- Fuel pressure drop under heavy acceleration
- Misfire at high RPM under load
- Lean air-fuel ratio on WOT pulls
- Engine hesitation when boosting
- Fuel starvation on E85 tune
Diagnostic Codes
- P0191 – Fuel Rail Pressure Sensor Range/Performance
- P0300 – Random or multiple cylinder misfire Det
- P0171 – Fuel Trim Malfunction (Bank 1)
Relevant Conversations
- Audi 4.0T fuel pump upgrade for E85
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- 4.0T fuel rail pressure low after tune
- Best fuel pump upgrade for 4.0T S6/RS7
- 034Motorsport vs APR HPFP upgrade
- 4.0T misfire at high RPM fuel related
- E85 fueling upgrade 4.0T
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | 034Motorsport |
| Part Number | 0001 034-106-6052-2 |
Videos
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034 Motorsport EA839 HPFP Installation for B9 S4, S5, SQ5, and RS5 2.9T & 3.0T Engines
Adding 151 HP to my Audi S4 w/ E85! Tuning, Fuel Pump Upgrade & Ethanol Sensor
UPGRADING THE HPFP PISTON IN MY AUDI S4 TO RUN A FULL E40 BLEND… (034 MOTORSPORT HPFP PISTON)
B9 AUDI S4 HPFP 034MOTORSPORT INTERNALS INSTALL VIDEO AND STAGE 2+ PULLS
034Motorsport HPFP Piston Upgrade Kit || Install Video || 2.0FSI
Audi 4.0T HPFP AUTOTECH upgrade and Low pressure fuel line
MQB High Pressure Fuel Pump Upgrade - Autotech Internals Install
How To Install an AutoTech High Pressure Fuel Pump - B8/B8.5 Audi S4 3.0t
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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