S4 Sprint airbox question

[Leo Leentvaar]

I am looking for the correct set up for the airbox that sits over the double Weber carb's. The previous owner fitted trumpets with only mesh wire over them. Fearing an engine bay fire when the carb's back fire, I bought a used air box and cover.
I do want to know where the flexi duct goes and how an air filter (pleated KN?) is mounted to the body work of the engine bay. I guess the duct is led through the hole between radiator and shell.
Any pictures may help me find the correct set up.

Thanks in advance for your input

[PeterDraper]

Hi
I have just had my Sprint on the RR and we found the original air box was removing 8 BHP. Fitted a K&N K/NUR-3130 from Deamon Tweaks in place of the old one in the nose cone. I will take a picture if of help
Peter

[SADLOTUS]

Checkout cliveboy's website. He has a K&N conical filter mounting setup, also the flexitube from airbox to filter.

http://www.cliveyboy.com/

Nice stuff, seen it at the shows.

[fasterbyelan]

Hi
I have just had my Sprint on the RR and we found the original air box was removing 8 BHP. Fitted a K&N K/NUR-3130 from Deamon Tweaks in place of the old one in the nose cone. I will take a picture if of help
Peter

Do you have data/BHP output with the K&N filter fitted?

[dlbarnes1]

I have a K&N conical filter (K&N P/N RU-2790) in place of the stock filter.
I used a short length of 3-inch, schedule 40, plastic pipe (3 1/2-inch OD) to connect the filter to the duct and made a bracket that fastens the pipe to the body. Very similar to the arrangement offered by cliveyboy.

Dave 72 Sprint DHC

[Leo Leentvaar]

Thanks guys, the info you provided will help me a lot.