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SKU: 11101-8 | UPC: 807298055794
Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 28mm Stainless Race Master Valves
Manley Race Master exhaust valves deliver reliable performance for Mazda Miata 1.8L BP056 DOHC engines in racing applications. This set of 8 valves with 28mm diameter fits 1994-2005 Miata Base and LS models precisely. Engineered for engines running up to 8000 RPM they support bracket drag and oval track demands with enhanced durability and flow.
Key Features
- Stainless Steel Construction: Forged one-piece design resists high heat and wear during extended racing sessions
- 28mm Diameter x 104mm Length: Matches OEM specs with 7mm stem for direct replacement and optimal sealing
- Swirl Polished Heads: Improves airflow by reducing turbulence for better exhaust scavenging and power output
- Undercut Stem Design: Reduces rotating weight above the keepers for quicker valve action at high RPM
- Bead Blast Finish: Ensures smooth surfaces to minimize friction and extend valve train life
Product Notes
- Confirm engine code BP056 or equivalent 1.8L DOHC before installation
- Store in dry conditions and apply light oil to stems for preservation
- Packaged securely to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Perform multi-angle valve job with seats cut to 45/30/60 degrees for best results.
- Compatible with stock retainers springs and locks or Manley performance valvetrain components.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1994-1997 | Mazda | Miata | Base |
| 1999-2005 | Mazda | Miata | Base |
| 2000-2005 | Mazda | Miata | LS |
Why Choose Manley?
- Decades of experience supplying valvetrain parts to professional race teams
- USA-manufactured with strict quality controls for consistent performance
- Detailed engineering matches exact tolerances for Mazda BP engines
Frequently Asked Questions
-
Q: Will these valves fit 1990-1993 Mazda Miata models?
A: No these are designed for 1.8L BP DOHC engines starting in 1994. 1990-1993 models use 1.6L B6 engines with different valve sizes. -
Q: What material and finish do these valves have?
A: High-grade stainless steel with swirl polished heads bead blasted necks and microfinished stems for maximum durability and flow. -
Q: What warranty coverage is provided?
A: Manley provides a limited lifetime warranty against manufacturing defects when installed and used properly.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box 10 x 6 x 2 inches
- Weight: 1 lb
Manley Performance
Founded in 1966 by Hank Manley, Manley Performance Products has become one of the most respected names in high-performance engine components. Originally launched as Manley Speed Equipment, the company quickly earned a reputation for precision manufacturing, durability, and race-proven performance. From grassroots beginnings in New Jersey to global recognition in professional motorsports, Manley Performance continues to set the standard in high-performance automotive parts. Manley Performance Engine Parts Manley is known for manufacturing premium internal engine components designed for street, strip, and professional racing applications. Their product line includes: Manley stainless steel valves Manley forged pistons Manley connecting rods (H-Beam, I-Beam, Turbo Tuff, Pro Series) Manley camshafts Manley crankshafts Manley valvetrain components Valve springs, retainers, and hardware Every Manley component is engineered with strict quality control and race-driven innov...
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