Difference between Golf GTI & Audi S3 engines - mechanically speaking???

[h100vw]

It's about 20bhp straight swap - basically there's a press release from Borg Warner stating that the K03 is limited to 195bhp, the K03S 215bhp and the K04 is 220bhp or 225bhp can't remember. But in terms of price and ease of swap the K03S is definitely bang for buck, because you use existing hardware rather than changing other components like you do when you introduce the K04.

It'll need software too obviously. The K04 can be run on standard hardware, with the right tune but it won't be making power like it could.

Gavin

[Speed]

It'll need software too obviously. The K04 can be run on standard hardware, with the right tune but it won't be making power like it could.

Gavin

Understood. What sort of money shoud I put aside for a custom code and is there a specific year model that they work from? I recall APR telling me that they couldn't do a 1997 A4 1.8T (They said it had to be after 1998.) Is this the same for custom code?

My wife may inherit my gti whilst I shop for a 4mo/quattro alternative, thats why Im asking about the years.

Cheers!