Generation III External Engine - Need length of Silicon Sleeve with Fast 102

For you guy that are running the Fast 102 intake with the fast boys 104mm airlid. How long of a silicon tube do i need?? This will be without a MAF.

Will 6 inches be long enough?? See below

http://intakehoses.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=C40B-400X6&Category_Code=SC4

Thanks

Anyone?