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Brian Crower Mazda MZR Valve Spring & Retainer - Steel Retainers

Marsoni M251S
Sale price$195.00
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Brian Crower Mazda MZR Valve Spring & Retainer - Steel RetainersSKU: BC0400S Brian Crower Mazda MZR Valve Spring & Retainer Steel Retainers Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Specifications Type: BC1400 Single Free Length: 1. 788" Seat: 1. 400" @ 86 lbs Open: 1. 000" @ 190 lbs Coil Bind: 0. 835" Retainer: BC2400S Spring Seat: OEM Net Cam Lift: 0. 480"
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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
4.0 ★★★★★
Based on 938 reviews
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Product Reviews
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Verified Purchase
ballpeen
Boise, US
★★★★★ 5
A must for tire repair
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Beats using a drill bit, this really is a must for tire plug, patch repair
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
T
Verified Purchase
Tim R
Lowell, US
★★★★★ 5
These tire repair reamers work great for plug/other type repairs
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These tire repair reamers work great for plug/other type repairs. Gone are the days of manually fighting a hand reamer through rough rubber. This is an efficient, neat and clean way to prepare a tire for the repair. Will purchase again as needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 27, 2025
M
Verified Purchase
Mark B.
Port Orchard, US
★★★★★ 4
Got what I paid for.
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
I dropped my drill with the bit installed. It broke quite easily. It was a relatively inexpensive so I can't complain. A higher quality harder metal would have earned 5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2025
A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 5
Great product
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These bits are great. We use them every day e when patching or plugging tires. Having multiple sizes helps us match the bit to the patch we use.
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Reviewed in the United States on April 17, 2026
M
Verified Purchase
Monty W. Parks
Massapequa, US
★★★★★ 5
Easy on the hands
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These make it much easier to ream tires that have been punctured. It takes the stress off of your hands, forearms and elbows especially when you’re plugging higher ply tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025

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