This is the Monsterflow Filter and the Carbon Fiber Intake tube, also have the heat shield from a 99 Miata
These were a limited batch made for Goodwin Racing Customers back in 2005, Mine is from a 99 Miata but can be made to fit other 1.8L Miatas, its lighter than any intake on the market, because the tube weighs only 5 ounces!!!
I have a postal scale and weighed it. Its nuts!!
Besides saving weight it also gives a dyno proven 10 hp gain according to the Goodwin website, it is CARB legal in all 50 states by executive order "D-591", and its looks killer in your engine bay, and has a really mean growl at wide open throttle!!
I also have a cold air shield thing from a 99 Miata from Goodwin that goes with it. If you have a 94 to 97 you can still by the optional heat shield from Goodwin Racing.
Paid over $350 for this when new!
selling for $275 SHIPPED, mine it like new with less than 5k miles!
THIS CARBON FIBER VERSION IS OUT OF PRODUCTION!!
YOU WONT SEE ANOTHER ONE ANYWHERE!
I asked Brian Goodwin about making more and he said he wont as they are too hard/expensive to produce.
And the regular urethane molded versions are now Made-To-Order!!!
I probably have less than 5000 miles on this as soon after I bought mine my first son was born and I only had time to start up my car on weekends to keep the battery alive.
This is the bottom side you wont see those emissions plugs, I closed them for my NA
Recently found the Goodwin Racing Isolator box / heat shield so adding that in as well.