E15ET Engine block is differnt from E15. It has oil port for turbo underneath the exhaust manifold and one at the back near the oilcooler. Oil cooler is located at the back of the block under the inlet manifold and it sits where the machanical fule pump on E15 engine.

Cylinder head is similar to N/A one. The only difference is the size of the valves. They are much bigger than E15 ones. The roker cover is also bigger. It sits about 2cm higher than N/A one.

Gear Box has different starter motor port and as far as i know has stronger bearings and shafts inside.

Manifolds are ofcourse different too. The ehaust manifold has turbo bolted onto it. Usually standart T02 water andoil cooled or some models had just oil cooled. People udgrate them up to T03 but I think they are a little too big for 1.5Litre 4cyl engine and take ages to spool. The most popular upgrades are T25 or T28. They have much better air flow and can supply more air at grater pressure.

The inlet manifold has no carburator attached to it like on N/A pulsar, it has throttle body and injector ports. Injectors supply petrol for each cylinder and can dump fule to run up to 15PSI.

Turbo is attached to the exhaust manifold and being spooled by the exhausts. The standart boost set to around 7.5PSI by the factory and can be increased by adding the boost controller to the rubber tube that ran from the actuator to the turbine outlet.

Electronic Management System (ECU) is being used on E15Et engines to operate the injectors and part of the ignition. Unlike N/A pulsars the distributor has no contacts and uses C.A.S (crank angle sensor) to tell the computer(ECU) what position the rotor at. The standart ECUs use external map sensor that is mounted on the firewall inside the engine bay. The oxigen Sensor is required by unleaded ECU. The older/leaded models did not need oxigen sensor(O2). They only used Air Flow Meter(AMF) when unleaded ones use both. O2 sensors are used to correct air/fule mixtures.

Fule tank is different to N/A pulsar. The electric fule pump is required to supply constant fule pressure for the injectors. The fule pressure developed in the fule system can reach up to 80PSI, which is very high and the high pressure fule lines and hoses must be used. The antisurge tank would be an assantial as it harms EFI if the pressure is droped by not having enough petrol in the fule tank. The surge tank always remains petrol in it.

Exhaust System is bigger in pipe diameter. N/A pulsars exhaust pipe diameter is 1"3/4 wheres turbo versions are at least 2" or 2"1/4. I believe the best size for N12 ET/EXA is 2"1/2 as the car does not loose lower torque as it can occure having bigger exhausts.