nah i thought maybe that too . but ive seen it it is ALL steell and .heaps of people reckon it doesnt spike and isnt effected by temperature like the audi ones .
i had an audi control on my vl turbo .and found that boost was higher under different load situations .
highest in 4th gear . a few people have melted the valves too . my norgren relief valve was all plastic and boost often spiked . although it made boost it was VERY unreliable.
even the e boost can ensure boost doesnt fall off in top end as the controller is able to sense the boost level and vary the valve to suit
the most interesting story behind the audi system is WHY did Julian edgar leave it out of his book published some time after the article .and furthermore why dont autospeed sell them?????????????
Not baggiing what you guys run may work well on your car but it sucked on my vl
and my mates wrx didnt like it at all made 3 psi more in 4th than 1st