Easy to install night and day difference and just knowing everything‘s getting proper lubrication.

i was already replacing the hpop and figured why not install was super simple installed fittings and tube fit right on no problems did notice right away engine began to idel smoother after install

Fit perfect

Had the rubber by pass, it leaked around the rubber and compression fitting, try the hard pipe this time, very happy with it. Also since the rubber did a upside “u” not sure if it was air lock. The hard pipe is linear.

Good easy install. Not in the way of nothing and smooth running results

Great product came fast install was super easy since I was replacing glow plugs was wide open.

Well, I can' say whether this helps or not. If it does, it's likely marginal but it's drop dead easy to install, is relatively cheap, is well made and fits perfectly, and it can't hurt. LIke RiffRaff's other specific products, it's well designed and perfectly made.

Works great and was easy to install

install was easy. i screwed up the first time and didnt lube the WHOLE o-ring so i kinda pinched one. first installed when i had the turbo and intake off to do up-pipes. easy! when i had to put new o-rings on i ended up taking the intake off and the cold intercooler tube for more room. still easy. CLEAN the head very well and get the WHOLE o-ring lubed up so you dont have the same problem i did. honestly i think it sounds a little better but i bought it for the science behind it. Clay was great and emailed me how to get a new o-ring on friday even though i didnt know they were closed (covid BS im assuming)