Oil System Improvement Parts- 2 Pcs - 4.0 Barbell & Front Gallery Plug

LS  4.0 BARBELL & Front Gallery Plug
The oil galley oil diverter Barbell in your Gen III & IV LS based engine is something that is overlooked. And yet it serves a very important mission of directing oil to the oil filter. If oil leaks past the Barbell, it will go unfiltered directly to the Cam Bearing, Lifters, Crank and Rod Bearings. The factory Barbell is approximately .020” smaller than the oil gallery, so particles as big as 250 microns can leak past the factory Barbell. Your oil filter will filter out approximately 25 Microns depending on the brand of filter. As the original inventor of the Aluminum Precision fit Barbell, we are always striving to make improvements. Our latest 4.0 update has, as with our previous versions, we use 7075 Aluminum unlike our competitors that are using 6061. Our 4.0 Barbell has a wider sealing area on the front of it, eliminating the need for an unreliable Oring. During our prototyping we tried an Oring on the front and when installing it, the Oring was getting sliced and chipped on the sharp internal oil ports and left Oring remnants that could have gotten in the lifters and bearings.

That’s probably why GM didn’t put an Oring on the factory Barbell.
Our Precision Billet Barbell fits with approximately .001” clearance which might only let 20-25 Microns pass by, that is the same or less than the oil filter. Another important part is the shaft of the Barbell. The oil must flow around it to get through to the oil port. Our latest design 4.0 Barbell has a 30% smaller shaft plus a more tapered design for much less flow restriction. We have also added a 1/4-20 threaded hole in the end of our Barbell for easy removal. Just screw a 1/4-20 bolt in and pull the barbell out. No more digging and prying to get the factory one out.

Better engine protection from much less and smaller particles bypassing, smaller less restrictive shaft for better oil flow, replaceable High Temperature Viton O ring and for ease of service a threaded 1/4-20 hole.  Why would you ever put the plastic factory Barbell back in your expensive Gen III & IV LS engine and let unfiltered oil in?  Our Precision LS Billet Barbell 4.0 Stops Unfiltered Oil & Increases Flow!

Reusable Front Oil Gallery Plug
Unlike the factory plug, this Billet Front Oil Gallery Plug uses a High Temperature Viton O ring to create the seal and is reusable. It is also easy to remove and install, unlike the factory plug. Use the threaded hole and ¼-20 bolt to pull it out. This Billet plug is great for the racers that tear their engines down for inspections.     

GM Gen III & IV LS Engines LS1-2-3-6-LQ4-LQ9-4.8L-5.3L-6.0L-6.2L & More!

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Read More

Delivery Time: All packages will be delivered within same day on most items if ordered before 2pm pt unless otherwise specified.

Order Processing: Your order will be processed for shipping within regular business days (Monday to Friday). Orders placed on weekends or holidays will be processed on the next business day.