NOTE: These are measured for fitment by the mounting diameter on the carb, not the carburetor bore or throat size. YOU MUST MEASURE FIRST, BEFORE BUYING I DO CARRY SCREENS! SEE EBAY STORE LINK BELOW https://www.ebay.com/sch/m.html?_odkw=screens&_ssn=kingpin91602&_osacat=0&_from=R40&_trksid=m570.l1313&_nkw=debris+screens&_sacat=0 BRAND NEW!!!!! sold as set of four! FITS: 54mm 55mm, ID of stack is 55mm they are slotted, so they can expand slightly, or clamp down harder to fit 54mm applications. These are measured for fitment by the mounting diameter on the carb, not the carburetor bore or throat size. these are 55mm mount diameter, and step down to 51mm throat/bore size. These do not come with debris screens, But I carry both Stainless and Brass Debris Screens: Cut and paste the link into your browser, to my ebay store below: https://www.ebay.com/sch/m.html?_ssn=kingpin91602&LH_PrefLoc=&_from=R40&_trksid=m570.l1313&_nkw=screen&_sacat=0 or see ebay item #: 223283520657 and Item: 223283520657 I will combine shipping, and refund you, so you won't pay for shipping the screens. I do carry debris screens: https://stores.ebay.com/cyclesmithpartsaccessories?_dmd=1&_nkw=debris eBay item number: 222677552582 Fits MIKUNI SMOOTHBORES VM33 RS36 RS38 RS40 Besides looking totally awesome, Velocity stacks improve the air flow into the carburetor, to increase induction efficiency, and increase horsepower on racing engines. Particularly Helpful when removing the stock airbox to create the vacuum necessary for good carb tuning and performance. Shorter length stacks are going to be better suited for top end power, while longer will have better low RPM power.I do carry debris screens: https://stores.ebay.com/cyclesmithpartsaccessories?_dmd=1&_nkw=debris eBay item number: 222677552582 Please check out my ebay store: https://stores.ebay.com/CycleSmith-parts-accessories just type whatever you are looking for into the search window! sold as set of four! Universal Aluminum 55mm Velocity Stacks, clamps included! YOU GET ALL 4!~!!!! Color/Finish: Machined Aluminum Dimensions: 55mm (2 3/16")ID x 61mm (2 3/8")Long (Mikuni measures these as 50mm as they don't count the mounting flange) 76mm bellmouth width at widest part Fits: Universal-55mm (also 54mm) check your carbs - you must measure) Material: UTRA Lightweight Aluminum YES, i can sell 1, 2 or 3 stacks, if you have a triple, or twin, or single with the same size! check my ebay store ---------------------------------------------------------------------------------------------------------- ACTUAL EBAY FEEDBACK: very high quality product, very pleased!! During past month MIKUNI Velocity Stacks 54-55mm Universal Velocity stack 54mm 55mm 56mm KRS003 Great Ebayer+++ Buyer: During past month Velocity Stacks 55mm Aluminum Universal Velocity stack light weight5 timely shipping!! #1 During past month Velocity Stacks 55mm Aluminum Universal Velocity stack Ultra light weight good ebayer!!!!!!!!!!!!!!!!! Buyer: During past month Velocity Stacks 55mm Aluminum Universal Velocity stack Ultra light weight Perfecto!!!!!!!!!!!!!!!!!!! During past month Velocity Stacks 55mm Aluminum Universal Velocity stack Ultra light weight Thanks again!! Buyer: Jun-05-14 13:05 HONDA 55mm Velocity stacks Contact me with any problems. Buyer to pay initial shipping cost as well as return shipping if returned for reasons other than defect. Please contact me before leaving neutral or negative feedback! I have a 100% feedback rating ! as always, ask questions first before buying!