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Precision 4.0 LS Billet Barbell
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The oil galley oil diverter Barbell in your Gen III & IV LS based engine is something that is overlooked. And yet it serves a particularly 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, allowing particles as big as 250 microns to leak past the factory Barbell. The oil filter will filter down to 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, as with all our previous versions, is manufactured using 7075 Aluminum that is nearly twice as strong and more than twice as expensive as 6061 that our competitors are using. Our innovative design 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 the Barbell, the Oring was getting sliced and chipped on the sharp internal oil ports and left Oring remnants that could have been pushed through the oil system and been caught in the lifters and bearings. That is probably why GM didn’t put an Oring on the front of their Barbell. Our Barbell fits with such precision that if anything did get by it would be smaller than what the filter would catch.
Another important part is the shaft of the Barbell. The oil must flow around it to get through to the oil port. By using 7075 Aluminum we can make the Barbell with a 30% smaller diameter 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 for servicing. 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!
Fits GM Gen III & IV LS Engines LS1-2-3-6-7-9-LQ4-LQ9-4.8L-5.3L-6.0L-6.2L & More!
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GM did not put alignment dowels for the Rear Main & Timing Covers on the LS family of engines. Instead, in the service manual they recommend using the very expensive KM tool. Many customers purchase our inexpensive AlignIt Tools along with the Barbell or Oil Improvement kits to make sure that the covers are perfectly aligned preventing premature failure of the seal and do overs.
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