N75 Valve and tuning

[Ant1981]

I need to replace my N75, but which should I go for? There's the J version, the K version and a few others, which really would be good for after stage 1?

[dom]

I need to replace my N75, but which should I go for? There's the J version, the K version and a few others, which really would be good for after stage 1?

Depends on the Map, Carbon maps work better with the J version, other maps differ

[Wazzzer]

If it was mapped for a standard valve, fit that. As Dom says if you want to go further with tuning it will be down to the mapper after that but you can't just throw anything in at the mo

[Chris.]

Id go for latest revision!

[The Doc]

I hear the latest revision makes your tappets rattle 

[Chris.]

Could always get a 'J' Valve and have overboost :|

[The Doc]

Could always get a 'J' Valve and have overboost :|

Which can be seen clearly giving issue in the graph of a carbon map using the N75J below?

[The Doc]

I need to replace my N75, but which should I go for? There's the J version, the K version and a few others, which really would be good for after stage 1?

Depends on the Map, Carbon maps work better with the J version, other maps differ

I hear they work much better when the owner plumbs them in the right way around 

[Ant1981]

I spoke to R Tec and they said to use nothing other than what was meant for my car.

[dom]

I need to replace my N75, but which should I go for? There's the J version, the K version and a few others, which really would be good for after stage 1?

Depends on the Map, Carbon maps work better with the J version, other maps differ

I hear they work much better when the owner plumbs them in the right way around 

Tw@t

I spoke to R Tec and they said to use nothing other than what was meant for my car.

Which is what has already has already been said, my car is mapped for a J valve, unless your car is mapped specifically for J then stick with standard!