Have a look in Tesco at the Stella Artois barrel you can buy. £15.99 for 5 litres of beer, BUT, check out that barrel as a heat shield for a K&N. Looks ideal to me. Cut a hole in one end fit the K&N into it and have a cold air hose coming up from the bottom of the car. The adapter for the barrel even fits a green cold air feed pipe. Ive measured it. hmmmmmmmmm. beer