yup. that's the charcoal canister. emissions equipment. won't hurt anything to not have it. a line runs from the tank to it to collect vapors.
__________________ 87 GT
308 rebuilt by me, Ross forged pistons, cobra intake, thumpers with 1.94/1.6s, afm n-412 cam, 65mm tb, proflow 75mm maf, 3.5" power pipe, 24# inj, 255lph fp, 1.6 rr's, kirban afpr, u/d pullies, KC clutch, pro 5.0 shifter, 4.10's, hedman L/Ts, 2.5" H pipe, spintech prostreets, frpp alum d/s, MAC c/c plates, MSD 6al, 3G alt, f/l sfc, UPR uca's/lca's, tokico shocks/struts, maxspeed springs, HID 5000k | 
Strange black box, under the air filter 
