Also see: How To Install A Miata Clutch
Intercooler – Ebay, CX Racing, Mishimoto, Flyin Miata (Kit), Fab9, and Trackspeed are all great options, with increased price comes increased quality.
They’ve got very similar performance to the small T25/GT25 Garrett turbos in both spool up and top end power
Intercooler Piping – CX Racing (Fitted Kit) [Note that if you do not run the CX manifold setup, this kit might require modification to fit correctly], Ebay (Cut/Fit Yourself), SiliconeIntakes (Custom order any pieces you need) – I have personally used SI and they have fast shipping, quality couplers/clamps, and you can return what you don’t use!
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Wideband – Innovate MTX-L, AEM Uego. I have had 3 MTX-L’s, a couple bugs here and there but I like them. Also see: How To Install A Wideband
Fuel Injectors – RX8 Yellows – I ran these in my 1.6 build at 220+whp with the stock fuel pump, absolutely great option. They fit into the stock fuel rail and use stock Miata plugs. There are a lot of fakes on Ebay though selling for like $30 a set, don’t be fooled! Same with the RX7 injectors, they are direct fit. The RX7 injectors are bigger so they support a little more power but have an older design that does not spray as well as the RX8 units. Unless you’re doing a budget build well above 220whp, the RX8’s are a better option. Five-O Motorsports 750cc’s are what I ran in my 1.6 build and made 295whp on E85 with a 340LPH pump. Injector Dynamics 1000 cc’s are what I run in my current build, the 1050X are the upgraded version. There are other options like Deatschwerks, KA Injection, and FlowForce. I haven’t personally run them but there are a lot of Miatas using them with excellent results.
ECU – Although it has some quirks and people who run Haltechs aren’t fans, the Megasquirt is undoubtedly the most widely used ECU in turbo Miatas. I’ve run 2 of them in my cars (MS2 and MSPro) and would buy again. You’ve got quite a few options depending on the year of your car, and if you want to build one yourself or buy a Plug-N-Play version: DIYAutoTune Also see: How to Install Megasquirt
Clutch – Alright you’ve got a lot of different options here. So many options I recommend you check out an entire article I dedicated to the topic of Choosing a Clutch For Your Miata.
Turbocharger – For a stock engine with a turbo I couldn’t recommend a better turbo than the Garrett GT2554R or the GT2560R. Both offer the same fast-spooling turbine wheel and housing, and a maximum power output of about 270whp and 300whp, respectfully. I wouldn’t recommend any larger Garrett (GT2860RS, GT2871R, GT3071R, etc) for a stock engine because lag is increased exponentially and you can’t really utilize the turbo’s potential safely on the top end. The one exception is the GTX2860R, especially if you’re planning on building your engine in the future. Respectable spool-up with a mean 400++whp potential. Although, I do believe the EFR6258 is better option than the GTX2860R in the 400whp category. The EFR6758 will spool nearly as fast as the 6258 but has an extra 60-80whp on the top end. Another popular choice is to start out with a Chinese T25/T28 or an SR20 T25 (Plenty can be found on the MiataTurbo and Zilvia Classifieds) because the flanges are identical to the GT2554R and GT2560R. This means you can get your turbo system set up and easily upgrade later without having to change your manifold or downpipe. Another great turbo that I barely touched on in the video is the TD04 frame turbos. They aren’t very popular in the U.S. but they are the turbo of choice in the U.K. for Miatas. One of the OG’s Quinn Kizis of GQM Garage Show rocked this turbo on his red 1.6L Miata making 254whp/238wtq.