I have just completed my mods and now ask a sImple question.... New K&N air filter {replaceing stock element} Vance and Hines Fuel tuner and Kuyrakayn Krushers {slip-ons} now do I drill the back plate of the air filter of not? I have a 07 ultra CLASSIC STOCK MOTOR
THANKS AND HAVE A GREAT DAY

 

Are you useing the stock air box? Doc

 

I have a extra SE backplate if your intrested

 

YES USING THE STOCK "FOOTBALL" AIR box

 

I have drilled 3 -1" holes in the bottom of the football cover and trimed the rubber ring at the holes to fit nice and round, I drilled the football not the backing then I routed the the breather tubes to the ground and pluged the the breather hole at the back of the K&N oem replacement filter. Flows real good and now have a dry intake. Doc

 

You cannot see the 1" holes drilled in the football at all unless you look under the football. I used a 1" hole saw and touched up the burrs with a round file. Doc

 

I personally like the stock airbox. And, I have my Willie G Skull on it so I wanted to keep it. I went with the 3909 K&N and am really pleased. It just extends the stock out about an extra inch. Nothing bad. And, K&N makes great products.

Greg

 

I used the K&N hd- 1508 . Doc

 

many opinions.. I thank every one for their help and offers..all things will be considered

 

i use a arlen ness round intake cover works great with the k&n filter with

the screaming eagle back plate-ride safe