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Precision 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 over looked. And yet it serves a very important mission of directing oil to the oil filter. If oil leaks pass 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 passed the factory Barbell. Your oil filter will filter out approximately 25 Microns depend on the brand of filter. Our 7075 Aluminum Precision Billet Barbell fits with approximately .001” clearance which will only let 20-25 Microns pass by, that is the same as the oil filter. Another important part is the shaft of the Barbell. The oil has to flow around it to get through to the oil port. Our Billet Barbell has a 30% smaller shaft plus the 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?  Precision LS Billet Barbell Stops Unfiltered Oil & Increases Flow!

Tech Note: Always make sure your oil is at operating temperature before running your engine hard! Also use a quality oil filter!
                                    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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Precsion Fit Oil Diverter Barbell  For All GM Gen III & IV LS engines including 
LQ4-LQ9-4.8L-5.3L-6.0L-6.2L & More!

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Precision Barbell
only $26.95 
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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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