Audi RS3 2.5 TFSI Engine DAZ for Sale

Product Overview

For sale is a fully rebuilt Audi RS3 2.5 TFSI five-cylinder engine, code DAZ, producing 294 kW (400 horsepower) — upgraded with Boostline H-Beam reinforced connecting rods and Mahle Motorsport forged pistons, and freshly rebuilt throughout with a comprehensive list of new components across the cylinder head, short block, rotating assembly, and sealing surfaces.

This is not a standard used or refurbished engine. It has been rebuilt to a specification substantially above the factory standard, incorporating motorsport-grade components that significantly increase the engine’s mechanical strength, thermal tolerance, and reliability under sustained high-boost or modified operation. Whether the buyer’s intended use is road, track, or a tuned high-output build, this engine provides a foundation far superior to any stock-specification RS3 replacement unit.

Engine Specification

Full Rebuild Specification

This engine has undergone a comprehensive rebuild covering every major wear and sealing surface throughout. The work carried out is as follows:

MOTORSPORT UPGRADE COMPONENTS

FULL REBUILD COMPONENTS — NEW THROUGHOUT

About the Audi RS3 DAZ Engine & Upgrade Component Choices

The Audi RS3’s 2.5-litre five-cylinder TFSI is one of the most distinctive and celebrated engines in the hot hatch and performance car sector — unique in its configuration, its sound, and its performance character. The engine has won the International Engine of the Year Award in its category multiple times and underpins the RS3’s reputation as the benchmark performance compact car for driving engagement and outright pace.

In high-power modified applications — where boost pressure, power output, and heat load exceed factory specification — the RS3’s standard connecting rods and pistons are well-documented limiting components. The Boostline H-Beam connecting rods replace the factory units with a reinforced, high-strength H-profile design that provides substantially greater resistance to bending and fatigue under elevated cylinder pressures. Boostline rods are a widely specified upgrade in the RS3 performance build community and are considered the correct choice for any build targeting output significantly above stock.

Mahle Motorsport forged pistons replace the cast factory items with a dimensionally stable, thermally superior forged alternative that handles elevated combustion temperatures and pressures without the deformation risks associated with cast pistons at high boost levels. Mahle’s motorsport piston range is used in professional competition applications globally — their inclusion in this engine signals a build intended for serious use, not a budget restoration.

Ideal For

• Audi RS3 owners requiring a rebuilt replacement engine following failure, bearing damage, or piston/rod failure in a high-power build
• RS3 tuning and performance buildstargeting power outputs above stock where factory internals would be a reliability risk
• Track and time attack RS3 programmesrequiring an engine built to sustain sustained high-load circuit use
• Audi specialist workshops sourcing a fully rebuilt, motorsport-upgraded RS3 engine for a customer build
• Buyers wanting a rebuild that addresses every known RS3 engine weakness simultaneously — head, timing, seals, bearings, rods, and pistons all addressed in one build
• Stage 2, Stage 3, and beyond RS3 buildswhere stock internals would be the limiting factor in reliability

Purchasing & Enquiries

This Audi RS3 2.5 TFSI engine, code DAZ, is available for immediate sale. It has been fully rebuilt with Boostline H-Beam connecting rods, Mahle Motorsport pistons, a complete cylinder head overhaul, new timing chain set, new bearings throughout, new piston rings, new crankshaft seals, and new head gasket — with oil pan and valve cover included.