I need an adjustable fuel pressure regulator for when my Lude goes in to be built/tuned and was going to go for an AEM one. Looking on their website though, it doesn't make it clear which one is suitable for the H22? The part numbers they have listed are 25-300, 25-301, 25-303 and 25-304, does anyone know which one I need, or doesn't it matter

 

i cant remember the exact number but it is important to get the right one or you will get the wrong fuel pressures or the wrong fuel return fitting. i believe its the 25-300. correct me if im wrong please

 

25-303 according to the AEM site, and it is supposed to only work with the AEM raill (i am thinking because of clearance issues).

 

that one has the wrong return fitting i know cuz that was the one i recieved and it had a side exit when it should be straight

 

Ah sorry, that link in my first post wasn't the actual AEM site, just a distributor. Looking on their actual website it does indeed say the 25-303

Reading through a few posts in the archives, a few people have mentioned that they have modded this to fit the stock rail. Is that just a case of using some extra fittings/adapters so that it fits?

 

the last one i fit on a sock rail did nto clear the diaphragm housing for hte IAB (the brass colored thing) so I had to do some filing as I recall to clearance it, I believeI filed a slot into one edge of the regularot possibly, though its been a long time to be honest.