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Brian Crower  |  SKU: brcBC0400

Mazda MZR Single Spring/Titanium Retainer Kit

$ 300.00
Shipping calculated at checkout.

Short Description

Designed for high-rpm builds, this BC valve spring and retainer kit keeps your Mazda MZR engine stable under pressure. Built to handle serious cam lift.

Pickup available at SHOP HQ

Usually ready in 5+ days

Delivery and Shipping

Domestic orders for in-stock items typically arrive within 5-10 business days, while international orders for in-stock items may take 12–15 business days.

If an item is out of stock or back-ordered, we will contact you within 3–5 business days with an estimated time of arrival (ETA) or alternative options before the order is fulfilled.

Price Match Guarantee

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Description

Take your Mazda MZR engine to the next level of performance with the Brian Crower Single Valve Spring and Titanium Retainer Kit. Built for high-rpm reliability and aggressive cam profiles, this kit is ideal for naturally aspirated or boosted builds running upgraded cams and tuning.

The BC1400 valve springs, made by PAC Racing, are crafted from premium chrome silicone alloy and engineered using proprietary heat treatment and stress relief processes to ensure consistent pressure and durability at extreme revs.

Matched with lightweight BC2400 titanium retainers, this combo delivers the ideal balance of strength and responsiveness, keeping your valvetrain in control even at elevated RPMs. With support for up to .480” (12.19mm) of net cam lift, this kit is perfect for aggressive setups that demand top-end stability.

Whether you're running Stage 2 or Stage 3 camshafts, this spring and retainer kit ensures your MZR stays reliable and responsive throughout the rev range.

Specifications

Vehicle Fitment: Mazda MZR Engines (All builds running upgraded camshafts)

Max Gains: Enhanced valvetrain stability at high RPM

Max Airflow Gains: Supports high lift cam profiles up to .480" / 12.19mm

Installation: Professional installation recommended; direct-fit with OEM spring seat

Material: Chrome silicone alloy springs (PAC Racing), Titanium retainers

Warranty: Manufacturer’s limited warranty

Origin: Made in the USA

Free Length 1.788"
Seat 1.400" @ 86 lbs
Open 1.000" @ 190 lbs
Coil Bind 0.835"
Retainer BC2400
Spring Seat OEM
Net Cam Lift 0.480" / 12.19mm

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