|  |  Do-It-Yourself MAF Housing
If you're making big power from your Subaru, like 400 whp or more, your factory MAF is probably pegged out at 5.0 volts. That'll throw a Check Engine Light (CEL), but more importantly it leaves your car unable to correctly meter fuel at airflows above the MAF's upper limit. A simple fix is to install a new larger housing. This MAF housing accommodates the stock mass air sensor, and has a larger 80mm diameter (stock is 65mm) so the observed MAF voltage will be below the 5.0 volt mark.
This is a do-it-yourself part -- plan to plumb it into your intake yourself, either by welding or using couplers and clamps. This is NOT compatible with the factory airbox or any other factory plumbing.
Note: This item REQUIRES custom ECU calibration in order to work right. If you bolt it on without custom tuning, you WILL blow up your engine!
Works great for blow-through MAF setups or traditional draw-through layout. Aluminum constructions. 76mm internal diameter. Good for about 500 whp.
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