4age (87-89) engines at Fensport

[dreja]

I was looking at fensport for engines and there's sth I'd like to clear:

On their page it's written:

4AGE ENGINES 1987 - 1989

Due to the lack of high quality low mileage Engines in the UK, we are now Importing 4AGE Engines from Japan. These Engines have usually only covered 50 - 80,000 miles, they are all the later type with strengthened blocks, larger crank journals and the cylinder heads have harder valve seats for Unleaded fuels. They are a DIRECT FIT in to your AE86 using your own exisitng ancillaries


I'm wondering what are these engines (are they red top ?) ? Are they really direct replacement of a blue top (without changing ecu, wiring, etc) ?

Tnx in advance
Andrej