Free Flowing MX5 ND RoadsterSport MAX Torque Stainless Steel 4-1 Standard Length Manifold
Fits both RHD and LHD, manual and automatic.
Quality header construction starts with mandrel bent 304 stainless steel TIG welded construction, making this the best ND 4 to 1 header with LIFETIME warranty! Beware the choices that are just straight pipe and sharp 90 degree bends because that's what's easy, they won't last and they won't give max performance in return for the trouble of installing them.
Yes, we make BOTH a 4-2-1 header that is ideal for midrange and street performance and this bigger 1.75" pipe 4-1 design for the track and supercharger crowd.
Saves 3 lbs (1.3 kgs)compared to the factory header.
Stock header weight:13.15 lbs (6kgs)
Max Power header weight:10.1 lbs (4.5kgs)!
HEAR it now from the tailpipe on the dyno! This full throttle with camera right at the tailpipe so this massively exaggerates the volume but gives you good feel for the character and tone at full throttle. You are hearing ALL THREE of the following here: RoadsterSport Max Power Manifold, plus the RoadsterSport Midpipe and RoadsterSport SuperQ Silencer.
The midpipe and silencer obviously not included with the manifold, sold separate on this site, as above.
Now details on our header and why you want it. For the FIRST TIME Mazda went with 4-2-1 factory manifold layout to make that fat midrange that makes the ND so quick. Many magazines get 0-60 in stock form at about 6 seconds flat, which is obviously not about the mere 155 hp that the factory rates this motor at the crank. We tested ND manifolds in both 4-1 layout as we have done in the past on NC generation, and 4-2-1 layout and quickly understood the factory thinking...this motor is about TORQUE, and this motor wants a 4-2-1 layout to maximize what this Skyactiv motor is designed to do.
Thus, first thing to know about the Skyactiv 2.0 motor is that a highflow 4-2-1 makes the midrange as beefy as you can get it.
Sadly, most folks only think HP and do not understand torque, but it is the really wide TORQUE curve of ND that makes it so quick compared to prior MX5's, and our humble opinion is that it is best to play to that strong point, give the ND skyactiv motor what it wants!
The results of going 4-2-1 are clear in the dyno results at bottom of this page, meaty torque start to finish (note results include Orange Virus Tune).
We strongly recommend the RoadsterSport SuperQ Header version muffler with this header because it was designed to handle the sound level of the header and our standard midpipe, most other mufflers will be too loud for most folks with this header change.
Our outlet is 2.5 inches. For best performance customers should match our header with our RoadsterSport midpipe and RoadsterSport SuperQ exhaust (special header version STRONGLY recommended) so they are running 2.5 inches of flow all the way...but our header will bolt in place of the factory header and connect perfectly to the factory midpipe (however doing that would mean an engine code unless you move second sensor after midpipe converter like our RoadsterSport midpipe provides plug and play).
Factory first O2 sensor is in the OEM header and stays in our header without use of extension cords. Factory second sensor in the midpipe should be moved after the factory midpipe converter to avoid an engine code (our RoadsterSport midpipe provides bung in that location for this reason). That second sensor reaches its new location without use of extension cords. Bottom line is full plug and play install...but we strongly suggest our Orange Virus or MotoEast Tune to get max torque results.
