Hi all I have an Sti wagon on an s plate, apparently the engine has been rebuilt and the heads are of an rb5, can someone explain the difference and if I am best replacing them where to source some replacements from, thanks

 

both cars are sti , if it’s running fine i would not worry about it , rb5 is quite rare i wonder if they are actually heads from an rb5 and where they came from , sti heads are normally better flow and stronger with slightly different cams in them 👍

 

And rb5 is a uk turbo2000.

 

as above RB5 had no mechanicla differences to the UK Turbo2000 it was based on..........

UK MY99/00 cars used slightly milder cams and "over bucket" shims in comparison the the STi spec cams and "under bucket" shim arrangement..

 

WOW, all the Facebook RB5 owners bigging up the unsuspecting community with what is essentially a UK Turbo 2000 with a JDM Paint code, retrimmed interior, nice Driving lights and a nice Wing

Thanks to Alyn, we can set things straight

 

There was a prodrive version of the rb5 that was higher spec but even rarer , a bit more power and a few prodrive bits added on 👍 i’m still in the wr1 camp

 

do you mean the optional WR Sport pack that basically added a slightly different spoiler and a PPP kit - oh and a nice decal on the speedo face............

still mechanically the same as any other UK Turbo of that era

 

just to add as Prodrive 'built' the special edition cars anyhows (Catalunya, McRae edition, Terzo, etc) I am not sure how you can get an 'even more special' Prodrive version???

 

a bit more spec and bolt on parts plus worth it for a bit more bhp too 👍

 

Sad to see the knowledge here is disappearing bar a few exceptions...

 

Most of what i know has come from the 22b forum..... not much gets posted there now.
It seems you old school guys have all moved on.
Failing that nasioc is the place to find info.