For different applications like carbed engines, refer to the part numbers for the proper application here... Stage 1 Installation Instructions - Harley Davidson Community This pertains to pre 08 bikes because of the larger throttle body on the 08 bikes. The part number for the 08 bikes for the backing plate will be different. HD no longer offers the K&N in the kit they sell but this way you can order the parts seperately for the TC fuel injected engine and get the K&N filter instead of the paper unit for less than it is offered for at the dealer. Below is the parts list for the Screamin' Eagle Stage I Kit for EFI Models (part #29773-02B). According to HD's web site it will fit '01-later EFI Softails, (except '05 FLSTFI 15th Anniversary), '02-later EFI Touring and '04-later EFI Dyna models. Does not fit '06 FLHTCUSE models with stock A/C cover. And retails for $139.95 ($108.71 at Zanotti's) not including tax and shipping. The problem with the kit from HD is that its overpriced and comes with a poor quality paper air filter, a gray back plate (that looks bad on chromed or black engines) and a chrome/polished SE A/C Insert (the disk that says "Screamin' Eagle" that you stick on the outside of the A/C cover) which also looks bad on a black A/C cover (IMO). In any event, here is the parts list so you can build your own SE Stage-1 A/C with a K&N Filter, proper back plate color/style . Search For A Part Just enter the part number and the quantity. They offer usually 20% off Part# - Quantity - Price -----Total -----Description 29478-05A - 1 $9.66 = $9.66 - Gray Back Plate 29620-99 - 1 $6.54 = $6.54 - Chrome A/C Insert (optional) 29583-01A - 1 $2.52 = $2.52 - A/C Gasket 99642-97 - 1 $5.90 = $5.90 - 243 Blue Loctite (optional) 29557-05 - X 2 $8.18 = $16.36 - Breather Plug 11292 - X 2 $.90 = $1.80 - O-Ring 29447-99A-X 3 $8.71 = $26.13 - A/C Mounting Stud 3938 - X 3 $.60 = $1.80 - Torx Screw Total: $70.71â€¦ Not including the K&N HD 0800 @ $41 at AutoZone/NAPA/Pep Boys = TOT $112.70 for Stage 1 complete with K&N filter to replace the paper stage 1 filter. Your total should be around $112.70. This will give you exactly what is in the SE Stage -1 A/C kit with a much better K&N air filter but without the installation instructions which can be obtained for you here. If you have a chrome engine, you can swap the gray back plate (29478-05A) for chrome version (29510-05 for $31.36). Bringing your total to $133.41 . If you have a black engine, you can swap the gray back plate (29478-05A) for a wrinkle black version (29586-06 for $27.24), Bringing your total to $126.29. To re-cap: Stage-1 A/C + K&N filter = $112.70 HD Dealer SE Stage-1 A/C + K&N filter = $176.38 Stage-1 A/C + K&N filter + Chrome back plate not Gray back plate = $133.41 HD Dealer SE Stage-1 A/C + K&N filter + Chrome back plate = $207.74 Stage-1 A/C + K&N filter + Wrinkle Black back plate not Gray back plate = $126.29 HD Dealer SE Stage-1 A/C + K&N filter + Wrinkle Black back plate = $203.62 Some installation instructions available here. Stage 1 Installation Instructions - Harley Davidson Community Also the Stage 1 for Sportster XL found here... Here's the part number list for the 08-09 models.