As in title best breather system to go for preferably without having to drill an tap the rocker cover.

Cheers.

 

I run a bailey system on mine but i'm not sure how effective on my 400+ it is

 

Just purchased a spec r one ,same as rod tarry uses,so should be fine,have used bailey ones before with no issues.think they all need rocker cover drilled

cheeRS stu

 

Bailey will be fine for 380-400....

 

Are breather systems tested by Fast Ford once? I know they did a RS500 intercooler test once or twice before.

 

Pro alloy which is a bailey style one on mine. I breath from the exhaust side of the block, inlet side of the block, and a return to the sump under oil level, then you have the atmosphere take off. Mine been fine so far.

A WRC style breath is allways going to be the best option but it does cost.

 

Ok thats great thanks everyone for the advice.

 

GGR ones, whit breathing from both side of block, and use the oe return under oil level

 

SpecR GRP A is spot on with mine!