manderal bent tubing
 

I putting a Ls motor into a 62 inpala Ive seen were some other cars are running a manderal bent tube to the firewall and getting the fresh air from the grill on the cowl. were do you buy that size tubing I will assume its aluminum? looks like 4' or better? Thanks Tim

Tim, check out the Chassis Shop. They have mild steel and stainless mandrels and donuts:

http://www.chassisshop.com

I bought my 3" and 4" aluminum mandrel bends for my supercharger intake and discharge from Woolf Aircraft

Warning in advance, it's not inexpensive and you'll need a good welder (equipment and guy running it) not to blow through it as it's thin wall stuff, especially at the OD of the bend where the material has stretched.

thanks guys ,I will check them out.Tim