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Details:93 to present BIG TWINS using FACTORY backing plate & breather tubes inside the air box. Detailed but simple instructions describe how to install two "micro vents" into the factory breather hoses. Installation is completely out of view. Part No. ETBT

Details:You'll now find that you have much better control of the car; can go faster & deeper into turns before braking! This is especially true for autos like Ferrari's that have an extremely small brake reservoir. WARNING: Your brakes will be much more effective than you have been used to. Go slow until "new braking" is comfortable! We've spun out more than once testing this setup. Part no. BV

Details:Racers & engine builders have asked for a simple, compact KrankVent™ that connects to the head breather ports & here it is. These compact bolts have the KrankVents built into the heads! Available in 1/2" threads for EVO's or 3/8" threads for Twin Cam engines. Kit includes 2 Buell/SA bolts, instructions. Part no. BUELL/SA

Details:A compact design, input fitted with 1/4" NPT male threads that attach directly to the crank case breather port of aftermarket cases; Pre-91 Sportster; Pre-93 Big Twins & cam cover vents on early XL's (shown below). Particularly well suited for OEM builders who want to eliminate the bothersome umbrella valves, rocker box mods/machining, and external head plumbing. This can be a tight fit on Rubber Mounted engines, check clearance. Allows head ... more info

Details:99.95 per set. Upon Availability due to limited quantities.

Details:91 to present XL's: No More Blowing Oil! Just replace the original 4" hollow bolts with the KrankVent™ bolts that have the Patented KV Valves built into the bolt heads Requires OEM style backing plate that breathes into filter element holes. Very clean! "Out of Sight" Solution for XL head breathers! Part no XLHB3

Details:Riders & Racers! Having trouble staying with the factory teams or just want to cure the oil blowing out of your cruiser!! From Ducati to Yamaha Road Stars, to high-twisting 14,000+ rpm inline 4's, you won't believe the results!! Top racers have tried all the knock-off valves & they report they couldn't hang! "We now run with, & beat, factory sponsored teams (Over 100 wins Daytona & Willow Springs!). The other crank case valves we tried literally ... more info

Details:These beautifully engineered & machined breathers do much more than just vent your engines fumes! For starters, they have the US Patented Crank Case Vacuum Valve built into them. So instead of just looking good but blowing oil all over you & your engine, these vents actually perform! The crank case vacuum they produce results in greater engine efficiency, faster response, better ring seal, no weeping gaskets, plus other advantages. The 303 ... more info

Details:These beautifully engineered & machined breathers do much more than just vent your engines fumes! For starters, they have the US Patented Crank Case Vacuum Valve built into them. So instead of just looking good but blowing oil all over you & your engine, these vents actually perform! The crank case vacuum they produce results in greater engine efficiency, faster response, better ring seal, no weeping gaskets, plus other advantages. The 303 ... more info

Details:Top American & Metric racers & big inch engine builders asked for it & now the ORIGINAL & BEST KrankVent™ has been designed for race & custom applications. Or, choose between 1/2" or 3/8" barb fittings. Threaded Krank vents no longer in production. Patented & proven performance! Part no. KVRC

Details:Designed for "head breathers" that use banjo bolts similar to those used with S&S carburetors. Instructions give preferred methods of installing. The banjo bolts are Tee'd together & the KV installed on the output. Simple! Part No. ETSS

Details:style "head breather" adapter that is a rigid chrome pipe that connects the two breather ports. Also use this kit for INLINE BREATHER Applications Part No. ETSE

Details:Crank Case Vacuum System provides essentially the same performance for a reduced price. The small size of these KV's makes them easy to fit into tight spots. Includes one mini KV with 3/8" barbs and one mini KV with 1/2" barbs. "Mini" Crank Case Vacuum Kit

Details:Internal works that are designed for only the most demanding & extreme racing applications; 50+ psi of boost, sustained full-throttle conditions, multi-staged NOS, etc. Includes one KV with 3/8" barbs and one KV with 1/2" barbs. Turbo Kit (Free Shipping)

Details:The Original & Patented Performance of the KrankVent™ is available for all head breathers! No more oil discharge all over you or your bike, no matter how hard you ride! These mini KrankVents™ provide a Hi Tech touch & blend in with your bike's appearance. Each Kit includes: 2 ET KrankVents, 2 of ET's Stainless Steel Breather Bolts, washers, tubing, Y, Instructions, extra washers.

Details:The original vents used by many custom engine builders & top racers of all types. Internal machining/valve is the same as the KVRC above & they are particularly well suited for race applications with very large displacement, high RPM engines. The KVSM uses a custom aluminum extrusion designed by ET to provide an integral mount that won't break off! Exit of KVSM is 1/8" NPT female thread; 900. & 1800 barb fittings provided w/ Stainless Steel ... more info