The S21 was the 1st Supreme to introduce the Quickfill Ballast system which is a 1000 pound hull-flooding ballast that fills the liner with water in under a minute. Optional Plug & Play ballast is available for professional wakeboarding and wake surfing. Inspired by the S226 the S21 is a wake surfing machine. The largest boat in its class with is excessive freeboard for performance, safety and spacious seating you’ll be shocked at how big this smaller boat is. A larger extreme pickle-fork design gives max seating for 12. Accessory BIMINI TOP PRO S5 TOWER (BLK ONLY)BOAT COVER GRAY W/ TOWER ANTI-POOLING SYSTEM (TAPS)BOW FILL CUSHIONCLARION CM-2 BLUETOOTH, AM/FM USB STER. W/6 WETSOUNDS WS65B SPKRS, WETSOUNDS HT-6 AMPGELCOAT SCHEME-SURFGROW BOATING FEE/WSIA WATERWAYS PRESERVATION FUNDHEATER W/(1) HOT TUBE & two OUTLETSPRO S5 TOWER SYSTEM (BLACK)SUPREME REMOVABLE AO COOLERSWIMSTEP TO MATCH REAR OF BOAT BY PLATFORMTANDEM AXLE BOATMATE TRLR W/DISC BRKS, ALUM WHEELS, LED LIGHTING, SWING TONGUE, STAINLESS RETRACT. TRANSOM STRAPS, ALUM FENDER STRAPS, WINCH, STRAPSWALK THROUGH WIND BLOCK Package SWSC PKG: PTM EDGE HD MIRR, PNP REAR BALLAST (2-550 poundS BAG PLUMBED), BOW BALLAST (1-725 lb BAG PLUMBED), QUICKSURF & two PAIR BOARD RACKS (SWIVEL LOWER&FIXED UPPER) Engines 2016 PCM GM MARINE EX3 CRUSADER 1.72:1 gram (5 year WARR)