do u need to replace the o-ring in the future?

The O rings would only require replacement if it was removed after the initial installation. If you were removing during engine replacement or rebuilding, we would recommend replacement at that time.

Will this fit a 2008 gmc Savana 3500 6.0L?

As long as it’s your standard LS block. Be at a 5.3, 5.7, 6.0, 6.2, or even a 7.0 Liter you are good to go. I bought this for my newly built 408 stroker 6 liter iron block and it is far superior to the stock style. I also like that it has a threaded portion in the back to be able to easily take it out if you ever need to, plus it’s double O-ringed.

Why is this one different than all the others? The barbell is longer on one end.

Take a look at the last photo in the listing, where you can see the barbell installed in the engine. You can see it's designed so the tip fills the entire closed section of the passage. The barbell is only narrow where oil needs to flow around it. This helps create a better seal at the tip and also makes the barbell stronger.

2008 chevy silverado 5.3 this will work on my engine

Yes, this will fit all Gen III and IV LS and Vortec family blocks, so it will fit your 5.3

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GM Gen III & IV LS Billet Rear Passage Plug Oil Diverter Barbell

GM Gen III & IV LS Billet Rear Passage Plug Oil Diverter Barbell

4.9/5

Product ID: 306399273

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Details

Brand
Improved
Automotive Fit Type
Vehicle Fit
Manufacturer
Improved
OEM Part Number
12573460

🔧Threaded M4x0.7 hole for effortless removal

⚙️CNC-machined billet 6061-T6 aluminum

🛡️Double O-ring Viton seal for zero leaks

Description

🛠️ Upgrade your LS engine’s oil flow game—because your ride deserves precision.

USER FRIENDLY DESIGN - Threaded hole allows quick, tool-assisted removal—no more struggling with stuck plugs.
DIRECT OEM REPLACEMENT - Fits GM Gen III & IV LS engines perfectly, making upgrades seamless and hassle-free.
PROUDLY MADE IN THE USA - Crafted domestically with premium materials, supporting quality and local manufacturing.
LEAK PROOF DOUBLE O RING SEAL - Viton O-rings create a fail-safe barrier, eliminating dirty oil bypass and protecting your engine’s health.
PRECISION ENGINEERED DURABILITY - CNC-machined billet aluminum ensures unmatched strength and longevity over OEM plastic plugs.

The GM Gen III & IV LS Billet Rear Passage Plug Oil Diverter Barbell is a precision CNC-machined billet aluminum replacement for the OEM plastic plug. Featuring a double Viton O-ring seal, it prevents dirty oil from bypassing the filter, enhancing engine longevity. Designed for easy removal with a threaded hole, this USA-made component fits GM LS Gen III & IV engines perfectly, delivering durable, leak-proof performance.

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TrustScore 4.5 | 7,300+ reviews

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Manufacturer	Improved Racing
Brand	Improved Racing
Item Weight	0.95 ounces
Package Dimensions	4.84 x 3.82 x 0.51 inches
Manufacturer Part Number	EGM-501
OEM Part Number	12573460

GM Gen III & IV LS Billet Rear Passage Plug Oil Diverter Barbell

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