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Description
atomic gear Atomic Barra Billet Oil Pump Gear Set – Atomic Performance ProductsAtomic Billet Oil Pump Gears Atomic Billet Oil Pump Gears Gas Nitrided for Ultimate Toughness Why You Should Upgrade Your Oil Pump Gears The factory Ford Barra oil pump gears are made from sintered irona process of compressing metal powder. While fine for a stock commuter car, this material is brittle and notoriously weak under shock loading. High RPM limiters, aggressive launch control, and torsional crank harmonics can shatter these gears instantly,
Atomic Billet Oil Pump Gears
Gas Nitrided for Ultimate Toughness
Why You Should Upgrade Your Oil Pump Gears
The factory Ford Barra oil pump gears are made from sintered iron—a process of compressing metal powder. While fine for a stock commuter car, this material is brittle and notoriously weak under shock loading. High RPM limiters, aggressive launch control, and torsional crank harmonics can shatter these gears instantly, causing immediate loss of oil pressure and catastrophic engine failure.
💡 DID YOU KNOW?
"Limiter Bashing" is the #1 killer of oil pumps. The sudden harmonic shock sent through the crankshaft when hitting a hard rev limiter acts like a hammer blow to the oil pump gears. Billet gears absorb this shock; factory sintered gears shatter like glass.
The Atomic Solution
We engineered the ultimate insurance policy for your engine. Our gears are precision CNC machined from 4340 Billet Steel, offering vastly superior tensile strength and ductility compared to the OEM sintered part. But we didn't stop there—we now Gas Nitride every gear set. This advanced heat treatment penetrates the surface to increase hardness and wear resistance while maintaining a tough, shock-resistant core.
Billet Steel Strength. Gas Nitrided Finish.
Precision machined tolerances for optimal oil pressure.
2. Precision Gerotor Design
Strength means nothing without pressure. Our gears are machined to exact gerotor profiles to ensure consistent volumetric efficiency.
- Gas Nitriding: Provides a hard, low-friction surface finish that resists scoring and wear against the housing, extending the life of the pump.
- Precision Tolerances: Machined to strict tolerances to ensure proper inner-to-outer gear clearance, maximizing oil pressure at hot idle.
- Direct Replacement: Designed to fit directly into your existing factory oil pump housing (housing condition must be verified).
Tech Specs
Material: 4340 Billet Steel
Treatment: Gas Nitrided
Design: Precision Gerotor
Application: Ford Barra DOHC 4.0L
⚠️ Critical Install Notes
- Check Housing Clearance: You MUST measure the clearance between the new gears and your oil pump housing. Worn housings will result in low oil pressure.
- Priming is Essential: Never start a fresh engine without priming the oil pump first. Pack the pump with petroleum jelly (Vaseline) or assembly lube to ensure it creates suction immediately on startup.
- Inspection: Always inspect the backing plate for wear. We recommend using our Billet Steel Backing Plate for the ultimate setup.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.4 ★★★★★
Based on 830 reviews
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Product Reviews
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days.
Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Worth it.
Size: 8.5, Color: Crushed Clay/Gum 2
Love all my Sorels. These were really cute, good color, comfortable, warm, fit well, good quality and sturdy. I would order again.
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Reviewed in the United States on March 26, 2026
★★★★★ 5
Fantastic Boots!
Size: 8.5, Color: Redwood/Gum 10
Completely satisfied with these boots. True to size, well made, comfortable from the get-go; not break in needed. Waterproof- really. The Red Suede has withstood a nasty winter season & still looks great. Good traction. I like the ankle height which looks good with long, mid length pants & leggings. I love the easy slip on/off aspect..made getting ready for dog walking easy. I 100%recommend!
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Reviewed in the United States on April 11, 2026