Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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For Your Every Summer RSVP, with Code: SUMMER15
Description
GM 12 Blt 5.57 Pro Gear Set Richmond Gear – Produced in ItalyPart Number: RP12B557 Drag Race Use Only Pro Gears may be necessary when tooth breakage occurs with Standard gear sets Produced from a softer material, the teeth can flex as opposed to crack and break The life expectancy can vary anywhere from 15 to 300 runs depending on the vehicle If a Standard gear provided acceptable life, a Pro gear may not be the right choice Designed For 4. 11 & Numerically Higher Carriers Will Not Fit Truck Rear Ends Machined
Part Number: RP12B557
Drag Race Use Only
Pro Gears may be necessary when tooth breakage occurs with Standard gear sets
Produced from a softer material, the teeth can flex as opposed to crack and break
The life expectancy can vary anywhere from 15 to 300 runs depending on the vehicle
If a Standard gear provided acceptable life, a Pro gear may not be the right choice
Designed For 4.11 & Numerically Higher Carriers
Will Not Fit Truck Rear Ends
Machined From 9310 Forged Steel
Heat Treated to Optimize Material Properties
Matched Ring & Pinion Set
Ring Gear
– 8.875″ OD
– Tooth count 39
– 12 bolt holes
– 3/8″-24 RH threads
Pinion
– 30 spline shaft
– Tooth count 7
– 7/8″-16 RH threads
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
4.7 ★★★★★
Based on 2174 reviews
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Product Reviews
★★★★★ 3
Runs large for a slim fit
Color: Black 02, Size: Large
I followed the size guide and ended up with an item that was to large in all areas. It did not fit like a slim fit. The fabric is odd and does not feel great against the skin. I love the design. I really wish it would have worked.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Prom 2026
Color: Blue 02, Size: Medium, Color: Blue 02, Size: Medium
Perfect fit true to size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 4
Not true to size but great quality.
Color: Black 02, Size: Medium
I bought a medium for my son who normally wears medium. It was extremely big. The quality and arm length was good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Nice suite
Color: Black&red, Size: Small, Color: Black&red, Size: Small
Delivery was on time. Suit fit perfect I bought it for my son 8th grade dance. It was worth the money and quality was good
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Does run big
Color: Black 02, Size: Small, Color: Black 02, Size: Small
Very nice suit but it does run big and I had to get it tailored! I really should have purchased the Xtra small for him!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
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