Skunk2 Ultra Street Intake Manifold | 1994-2005 Mazda MX-5 Miata 1.8L NA/NB (307-10-1000)

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1994-2005 Mazda MX-5 Miata 1.8L NA/NB Ultra Street Intake Manifold by Skunk2

Building upon the performance legacy of our Pro Series Intake Manifold, as well as using the latest in CFD (Computational Fluid Dynamics) software; Skunk2 Racing has created a three-piece modular design that allows for easy disassembly, porting, and plenum volume changes through the use of a removable plenum. In addition to CFD testing, the Ultra Street Intake Manifold has undergone extensive in-house dyno and on-car testing which has led to a design that is less restrictive, yielding both torque and power gains well over any other offering!

Skunk2 Racing Ultra Street Intake Manifolds are cast-aluminum, manufactured from high-grade 356 aluminum alloy for strength and lightweight. Each manifold is CNC-machined for a precise fit, and individually inspected for quality assurance. The Ultra Series Street manifold features a generous 68mm throttle body opening and is constructed with thick walls at entry, minimizing concerns of breakthrough when port matching. Intense planning and design went into the plenum (1.8L plenum volume) to distribute even airflow to all four cylinders under dynamic load conditions. Placement and design of the velocity stacks were rigorously flow tested to ensure maximum delivery of air to the cylinder. Large velocity stack raised bell mouth entries lead to 10.00” long intake runners with smooth transitions allowing the Ultra Street Intake Manifold to outflow all other production intake manifolds.


  • Modular 2pc. Design w/ Removable 1.8L Plenum
  • Tapered 10.00” Long High-Velocity Runners with Raised Velocity Stack Entries
  • Generously Cast Runner Walls for Porting
  • 68mm Throttle Body Opening
  • Eliminates Obstructive VICS and VTCS Butterflies
  • Lightweight 356 Aluminum Alloy Construction
  • Hi-Grade Mounting Hardware
  • Tapped with 1/8” NPT, 1/4” NPT and 10mm Threads for Accessories
  • Includes Thermal Intake Gasket and Throttle Cable Bracket


  • 1994-1997 Mazda MX-5 Miata NA 1.8L
  • 1998-2005 Mazda MX-5 Miata NB 1.8L


  • Significant HP/TRQ Gains
  • Increased Airflow
  • Strong and Durable Construction

What's In The Box?

  • 1 - Intake Manifold
  • 1 - Removable Plenum
  • 1 - Thermal Intake Gasket
  • Necessary Mounting Hardware
  • Warranty Information


  • Skunk2 Manufacturer's Warranty

Customer Reviews

Based on 3 reviews
Ryan wallace
Fits well

Fitment was good very different from stock they should advertise you delete almost everything (air valve, EGR , almost all of your vacume lines) the intake gasket that comes with it is not the greatest quality would use oem. Fitment is low witch makes lower bolts a pain to get in need S wrenches to get them. Sits lower for my na so sits touches fuel lines had to bend and reroute. Comes in contact with charcoal cansiter you'll need to delete that as well. Throttle cable bracket flemsy buy aftermarket one 97 fuel rail didn't fit might have been because of 99 head but fits perfect with radium fuel rail finish was good could send more fittings for vaccum lines

Nice Product

Nice fit and finish. Not many aftermarket intake manifolds out there for Miata, so glad this came out. Quality looks good.

Michael piper
Skunk2 Ultra Street intake

Very good product would buy from them again and customer service