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Manley Performance Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
Manley Performance Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
Manley Performance Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
Manley Performance Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
Manley Performance Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves
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Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Exhaust 29mm Stainless Race Master Valves

MAN11103-8
807298055831
Valves
4 Units In Stock - Ships Next Business Day
$ 263.93 $ 211.14
$ 211.14

SKU: 11103-8 | UPC: 807298055831

Manley 1994-2005 Mazda Miata 1.8L BP DOHC 16 Exhaust 29mm Stainless Race Master Valves

Manley Race Master exhaust valves deliver reliable performance for Mazda Miata 1.8L BP DOHC engines in bracket drag oval track and road racing applications. These 29mm stainless valves fit 1994-2005 Miata Base and LS models running up to 8000 RPM. Set of 8 valves ensures consistent exhaust flow and engine breathing for track demands.

Key Features

  • Stainless Steel Construction: Heat-treated forged one-piece design with stellite tipping on exhaust face resists high heat and wear during extended racing sessions
  • 29mm Head Diameter: Precision 29.00mm x 6.98mm stem x 110.49mm overall length matches OEM specs while improving flow in performance heads
  • Swirl Polished and Machined: Polished valve backs fully machined margins and hand-chamfered edges reduce turbulence for smoother combustion and power gains
  • High RPM Capability: Built for engines revving to 8000 RPM with stress-relieved forgings to handle extreme valvetrain stresses
  • Set of 8 Exhaust Valves: Complete set replaces all exhaust valves MPN 11103-8 for full rebuild or upgrade

Product Notes

  • Special order item confirm stock before ordering
  • No core charge required
  • Ships in protective packaging to prevent damage

Installation Notes

  • Professional installation recommended.
  • Inspect valve seats and guides replace seals during install for optimal sealing
  • Compatible with stock cylinder heads performance valve springs and retainers

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?

  • Proven in NHRA IHRA and SCCA racing for decades
  • Aerospace-quality forgings ensure durability under race conditions
  • Exact tolerances from CNC machining for drop-in reliability

Frequently Asked Questions

  • Q: Will these fit 1999-2005 Mazda Miata Base models?
    A: Yes these 29mm exhaust valves are direct fit for 1.8L BP DOHC engines in 1999-2005 Miata Base and 2000-2005 LS submodels
  • Q: What material are the valves made from?
    A: One-piece forged stainless steel with stellite hard facing on exhaust valve faces for heat and wear resistance up to 8000 RPM
  • Q: What is the warranty on these valves?
    A: Manley provides a one-year unlimited mileage warranty against manufacturing defects when installed by certified engine builder

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Secure tube packaging 11 x 5 x 2.8 inches
  • Weight: 2.1 lbs

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