MAZDA Exhaust Camshaft Cam Shaft B61P-12-440

( Manufacturer Part Number: B61P12440 ), ( Type: Camshaft ), ( Ipn: B61p-12-440 ), ( Oe/oem Part Number: B61p-12-440, B61p12440 ), ( Items Included: Seal, Bolt ), ( Material: Rubber ), ( Vintage Part: No ), ( Country Of Origin: Japan )

Review MAZDA Oem Exhaust B61p Camshaft Cam Shaft #1 fits MIATA MX5 MX-5 EX 1990–1993

The Mazda B61P12440 exhaust camshaft is a crucial performance upgrade for the 1990-1993 Miata MX-5 (MX-5) models. This camshaft is specifically designed to replace the original B61P camshaft to deliver enhanced power and improved engine response.

This aftermarket camshaft is manufactured to exacting specifications using high-quality materials, ensuring a reliable and durable upgrade for your Miata. It features a unique design with increased valve lift and duration, which results in more efficient combustion and increased power output.

By increasing the intake and exhaust durations, this camshaft improves the engine's breathing capabilities, allowing for better airflow and more complete combustion. This leads to a noticeable increase in horsepower and torque, making your Miata feel more responsive and lively on the road.

Additionally, this camshaft upgrade can also improve the engine's idle stability and reduce engine vibrations. The result is a smoother, more refined driving experience that is sure to please even the most discerning Miata enthusiasts.

Installing this camshaft is a relatively straightforward process, making it an excellent choice for those looking to add some extra power to their Miata without the need for extensive mechanical work. It is important to note, however, that this camshaft upgrade may require additional modifications to the engine, such as a performance air filter or an upgraded exhaust system, to fully realize its potential.

In summary, the Mazda B61P12440 exhaust camshaft is a high-performance upgrade for the Miata MX-5 (MX-5) models from 1990-1993. It delivers increased power and improved engine response through its unique design, which includes increased valve lift and duration. This upgrade is a great choice for those looking to add some extra excitement to their Miata and take their driving experience to the next level.

Pros and Cons of Buying Mazda B61P12440 90-93 Miata MX-5 Exhaust and Camshaft Kit

The Mazda B61P12440 exhaust and camshaft kit is a popular aftermarket upgrade for Miata MX-5 owners. This kit includes both an exhaust system and a camshaft. Let's examine the pros and cons of investing in this performance enhancement.

1. Power and Performance: The B61P12440 camshaft is known for its aggressive valve timing and lift, leading to increased power output and improved engine response. Additionally, the new exhaust system reduces backpressure, allowing for freer engine breathing and better performance.

2. Sound: The new exhaust system produces a more aggressive and desirable exhaust note, enhancing the driving experience for many Miata enthusiasts.

3. Durability: Mazda's original equipment (OE) camshafts are known to wear out over time, especially in high-performance applications. The B61P12440 camshaft is a durable aftermarket alternative, designed to provide better longevity and reliability.

4. Improved Throttle Response: The new camshaft and exhaust system combination can lead to improved throttle response, making the car feel more responsive and agile.

1. Cost: The B61P12440 exhaust and camshaft kit can be quite expensive compared to individual exhaust or camshaft upgrades.

2. Installation Complexity: Installing this kit requires a fair amount of mechanical expertise, and the process can be time-consuming. Some Miata owners may prefer to leave the installation to a professional shop.

3. Increased Noise: The new exhaust system may produce a louder exhaust note than the stock system, which some drivers may find unwelcome, especially in urban environments.

4. Fuel Economy: Performance upgrades like this can negatively impact fuel economy. Drivers should be prepared for slightly reduced fuel efficiency.

The Mazda B61P12440 exhaust and camshaft kit offers several benefits, including increased power, improved performance, and a more desirable exhaust note. However, it comes with a higher cost, increased complexity, and potential drawbacks like increased noise and reduced fuel economy. Ultimately, the decision to invest in this kit depends on the individual Miata owner's priorities, budget, and mechanical expertise. For those seeking maximum performance and a more engaging driving experience, the B61P12440 kit may be an excellent investment. For those who prioritize comfort, fuel economy, or ease of use, other options may be more suitable.

If you are a Miata enthusiast with a strong desire for increased power, improved performance, and a more aggressive exhaust note, the Mazda B61P12440 exhaust and camshaft kit could be an excellent investment for you. Ensure you have the necessary mechanical expertise or access to a professional shop for installation, and consider the potential drawbacks in terms of cost, complexity, and fuel economy before making your decision.

Details:

Item fits 1990 1993 Mazda Miata. Proudly servicing the Mazda Community for 19 Years. From one grassroots enthusiast to another.

part #: b61p12440 prices

• $104.45-$142.45

specifications cashalif:

• for models: Mx5, Mx-5, Ex, Miata
• for makes: Mazda
• for years: 1990-1993
• mpn: B61p12440
• type: Camshaft
• ipn: B61p-12-440
• oe/oem part number: B61p-12-440, B61p12440
• items included: Seal, Bolt
• material: Rubber
• vintage part: No
• country of origin: Japan

seller cashalif:

• rating: 100.0%
• # reviews: 9427
• city: Greer, South Carolina

payments cashalif:

• wallet: Apple-pay
• other
• credit card: Visa

offer cashalif:

• options: Ship-to-home
• started: March 5, 2026
• sold: 0
• quantity: 1
• availability: In Stock

returns cashalif:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

general cashalif:

• condition: Used
• Engines Engine Parts > Valvetrain Components > Camshafts

shipping cashalif:

• class: Standard
• service: UPS Ground
• cost: $0.00
• type: Fixed
• carrier: UPS
• transit: 4-7 Days

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