RTM Turbo Oil Return Line Fitting (at Oil Pan) for Holset Turbos

Ok, so you've heard all about the Holset turbos. They're readily available, cheap, easy to rebuild, and can make big power. You've also heard about how they need LOTS of oil to lubricate them, and therefore a huge oil return line. The standard -10AN is just too small for a Holset. That means you need to drop your oil pan to weld a fitting onto it. A bit of a PITA just to upgrade the turbo!

Once again, RTM to the rescue! We have made a fitting that will BOLT RIGHT ON to the stock location of a DSM, and will accept 3/4 NPT fittings so you can run a -12AN line. No welding, no ripping your engine apart.......two bolts and a gasket! Sounds too good to be true, right? Well, we aren't going to lie to you....there is a small downside. The most restrictive spots in the -12AN line are inside the fittings themselves at .600" diameter. The oil return port on the oil pan of a DSM (as it comes from the factory) is about .570" diameter. That means you're restricting flow by 8%. Personally, we feel 8% is a pretty small price to pay for saving tearing the oil pan off, getting it welded, trying to get it to seal again, and on and on. Also, if you ever DO remove the oil pan, you can just dremel that opening out to .600" or bigger and have NO restriction.

RTM also carries a complete -12AN (3/4 NPT) turbo oil return line. For details, please refer to the "Related products" section near the bottom of the page.

NOTE: Photo is for display purposes and depicts fitting with gasket and bolts.  Be assured that your order will correspond to your selections in the drop-downs.

Available as the fitting will stainless bolts, or with stainless bolts and an OEM gasket.

Choose from drop-down below: