IE 1.8T Sport Short Block | Fits VW & Audi 06A 20V

ALT-Integrated Engineering




IE's Sport Series assembled short block for your VW or Audi 1.8T 06A big turbo build is the drop-in ready foundation for a reliable street and track monster! Each short block is precisely built with carefully specified components for high-powered engine applications being used for track and street use. This 1.8T assembly offers incredible strength with longer term reliability and factory-like operating characteristics. Machined using industry leading practices and assembled in-house by an IE certified race engine technician utilizing precise measurement and assembly tools not found elsewhere. Your sport series short block will serve as the strong foundation for your VW/Audi powerhouse. 


  • Multi-point inspected and cleaned OE 1.8T 20V 06A block
  • Bored and honed cylinders using IE torque plate
  • Short block deck surface machined for exact flatness
  • OE crankshaft receives polished journals and chamfered oil holes
  • Precision file fit Mahle Motorsport piston rings for perfect compression
  • Complete multi-point critical dimension checklist and measured clearances
  • IE forged Tuscan I beam connecting rods with rifle drilling
  • Mahle bearings installed to exact measurements
  • Assembled with only top of the line verified measurement tools


  • IE Tuscan I beam connecting rods
  • Mahle overbore 8.5:1 CR forged pistons
  • OEM main bolts
  • OEM thrust washers
  • Mahle Motorsport rod bearings
  • Mahle Motorsport race main bearings


When ordering your new performance short block, you have the option to send in your block and crank to be built, or purchase cores from IE to be built instead. In most cases, we recommend sending in your existing engine to be built for a faster turn around time and lower cost. Core charges are a great option if your existing short block and/or crankshaft has significant damage and can not be used. All cores will be critically inspected and verified by an IE Race Engine specialist before being accepted as a good and usable core. All engines are assembled in-house and assembly times can vary depending on workload. Typical build times can be as fast as 1-2 weeks or as long as 3-4 weeks from the time we receive your cores. If you choose to purchase a core, this does not guarantee a faster turn around time and cores are not guaranteed to be in-stock at time of purchase. If you have any questions about the ordering or core process, please contact our engine specialists at

Block Core Charge
Add this option to cart if you can not supply a usable 06A 1.8T 20V block. Block must include main caps.

Crank Core Charge
Add this option to cart if you can not supply a usable 06A 1.8T 20V crankshaft.

*Only select a core charge if you are NOT sending in your own block or crank.


Once the OEM VW/Audi block is cleaned and multi-point inspected, an Integrated Engineering torque plate is used to secure the block into the proper shape during the boring and honing process. This guarantees true round cylinders and results in precise piston to cylinder wall clearances necessary for long engine life. The block deck receives a freshly machined surface for a proper head gasket seal and strong compression. The maincaps are installed and measured to exacting specifications using new OEM main bolts ensuring exact roundness for proper crank stability. The rotating assembly is then installed with Integrated Engineering forged Tuscan I beam rifle drilled connecting rods, Mahle 81.5mm 8.5:1CR forged pistons, Mahle Motorsport rod and main bearings, and a polished OEM crankshaft by an IE expert engine builder. All clearances are recorded on a multi-point critical dimension checklist with all measured clearances that is included with your block, along with an instruction & care pamphlet.


IE Tuscan I Beam Connecting Rods
IE Tuscan I Beam rods are the premium benchmark connecting rod application offering industry leading strength to weight ratio and support up to 1000BHP!
The Tuscan design is custom-crafted and optimized by our engineers using the latest CAD and FEA software then rigorously tested in our in-house engine dyno and chassis dyno test cells. This results in a connecting rod that is uniquely strong and light, for the ultimate in performance and reliability. With the included rifle drilling option, oil is forced to the wrist pin by means of a small hole drilled through the rod vertically. This reduces friction on the pin and pin bushing, thus reducing wear and further extending engine life.

Mahle Motorsport Forged Pistons
The included set of forged pistons make for a stout reliable engine for daily driving, road racing, drag racing, or full out competition racing. Mahle pistons utilize weight-optimized aluminum pistons manufactured from high-temperature resistant aluminum-silicon alloy. This alloy along with Mahle's refined design and production technology enable an ideal combination producing pistons with low weight and high load-bearing capacity. Mahle pistons are treated with their own GRAFAL skirt coating, this greatly reduces the skirt to wall surface friction and increases scuffing resistance and lower engine noise.

Mahle Motorsport Rod & Main Bearings
Mahle Motorsport manufactures the highest quality race bearings available proven time and time again by race engine builders including F1 race teams. With many special features, these bearings have great wear characteristics and added durability for long engine life. Mahle uses a proprietary tri-metal blend to provide a stiffer bearing under high load use, which is necessary for race engines. Each bearing is designed with state-of-the-art software for the ideal oil film thickness, which adds reliability and greatly reduces the chance of spinning a bearing.

Crankshaft Re-manufacturing
Every crankshaft receives specialty machine work before engine assembly. The oil holes are chamfered and the journals are polished for improved oiling properties before receiving a multi-point critical measurement test to ensure long operating life of the rotating assembly.


Each block is finish painted with durable black enamel and packaged inside a specialty engine bag with a desiccant pouch to remove any moisture that may accumulate during the shipping process. They are then securely bolted into specially manufactured shipping crates ensuring there is no damage.


  • VW GTI MK4 1.8T 20V engines
  • VW Golf MK4 1.8T 20V engines
  • VW Jetta MK4 1.8T 20V engines
  • Audi TT MK1 1.8T 20V engines
  • Audi A3/S3 MK1 1.8T 20V engines
  • Audi A4 B5 1.8T 20V engines (06A only)
  • Audi A4 B6 1.8T 20V engines

*Audi A4 B6 engines have a different water thermostat housing than other 06A blocks. When purchasing a longitudinal B6 06A short block, you will need to supply a B6 A4 06A core, or modify the thermostat housing of a non-B6 block.

This is a short block only, the block will be assembled with all internal rotating assembly parts listed in the product description only. You will be required to supply the cylinder head, oil pump system, engine accessories, gaskets, manifolds, etc... of your choice.