Assuming u have a stock exhaust i think either cobra or kolpin make a stealth exhaust
2004 Honda 400 EX (Blown Up - Sold) - DG Nerfs, DG Bumper, DG Full Skid Plate, DG Swingarm Skid,
OMF Scoops, Pro Taper Handlebars, Pro Circuit Full Exhaust, K&N Filter, Outerwears, Razr's Rear, Razr 2's Front, Steamline Rear Rotor
2006 Honda 250EX - Stock
2008 Honda 450ER - Full HRC Kit, Black HMF Competition Series Slip-On, DG Full Skid Plate, DG Fat Series Rear Skid Plate, Black Pro Taper ATV High Bend SE Handlebars, ODI Rogue Lock-On Grips, ODI Bar Ends, Rox SpeedFX Dash Board, K&N Filter, Blue Outerwear, Pro-Tec MoFlow Airbox Lid, Maxxis Razr Rear Tires, Maxxis Razr2 Front Tires, Candy Blue Blingstar Iron Cross Front Bumper, Pro Armor Kill Switch, Candy Blue Houser XC Nerf Bars,