IT'S BACK!!

3D Printed Version 2

By popular demand, we resurrected and updated fxStein's original Monster Big Air kits!!!

Back in 2009 when the Second-Generation V-Max was released, a tuner named fxStein developed an air intake system that eliminated the restrictive OEM air box and replaced it with 4 individual velocity stacks. Each stack was designed to hold its own individual air filter. It was common to see gains of 10+ RWHP when going from a completely stock unmodified air box to the Monster Big Air. It was known as the "Mod of all mods" for the intake system.  Well, time passes and priorities change. We sold all of our inventory of them and in time the kits disappeared. Often, I still get request for this mysterious intake system, and nobody knows how to get it. It was unobtanium, until now. We resurrected the old stacks and made some improvements and sold them as the Gurued Big Air Stack or GBA. Not all bikes are exactly alike. After getting feedback about the GBA-V1 stacks, we made some refinements to allow for manufacturing tolerances of the throttle bodies. The GBA-V2 stack has been updated to fit better. This kit includes four- 3D PRINTED velocity stacks. Compared to the old monster stacks, the flange size was increased to make them stronger. We also made the flange thicker to accommodate the stock O-Ring as well as being able to use the OEM Velocity Stack bolts without them bottoming out.  We also modified the top neck and sized it to fit the HA-3094 air filter as the filter used in the original setup has been discontinued. Since we no longer carry K&N filters, you will need to order 4 separate air filters from K&N P/N HA-3094's elsewhere to complete this installation. You also need a 1/2" push-in filter for the crank case ventilation. Remember to re-use the bolts from the bottom OEM stacks and the O-Rings from under the stock air box.  Also note these stacks require a reflash of the ECU or an aftermarket tuner to compensate for the fuel change requirements. We are the only reflash service that offers a new Throttle Opening in our tunes that regains some of the power lost by removing the air box and YCC-i stacks. Prior customers can change reflash tunes for $45 on our retune page here.

Be aware, these are not the beautiful aluminum stacks we have short production runs made of from time to time. If I have any aluminum stacks in stock, they can be found here. These are 3D printed stacks. They are extruded in ASA filament here in our shop. ASA is a robust and chemical resistant filament which should give decent performance for a long time. That being said, 3D printing with newly available filaments is a risk.  Although we have ran a set of these stacks on a couple of bikes for 4 years now without issue, we recommend you check these stacks often. Look for cracks, delamination or decay. Although the latest 3D printer we use does an awesome job, there will still be minor imperfections and flaws. We use HIPS as a support material and the stack may have a few remnants embedded in it from printing. We will stock these in Gray or Black. Typically, we can print and ship a set in 48 to 72 hours if we have the filament color you want in stock. For an additional fee, we can custom print it in any color ASA, PETG or ABS you wish. Call or Email us if you want to place a custom order. Carbon Fiber impregnated filament is an expensive option. ;-)

** NOTE - During installation of each stack, tighten the two bolts evenly making sure the stack inserts straight and true. Torque bolts to 8.7 ftlbs.