But what does it all mean ?

sorry to trouble you guys but i figured you might be able to help me with this; what does the DETT in RB26DETT i've worked out that the RB26 is the engine model but i've seen things like SR20DET and i don't understand what the end letters mean does it mean Dual Exit Twin Turbo or what sorry if it's a stupid question but it's been troubling me for ages.

Thanks Guys
Chris

DET

D = Double Overhead Cam
E = Electronic Fuel Injection
T = Turbo

you're a good man i have a friend who works with tuning and he used to always refuse to tell me
Cheers (Thanks) by the way