2 1/4 or 2 1/2 in upper ic pipe on smic

[it's a T]

which pipe would you get for your stock side mount intercooler? the 2 1/4 or 2 1/2? which bov (considering in and going to vent to the atmosphere w/ GM MAF) would you get? i want a direcet bolt up!
http://www.dejontool.com/DSM-2g SIC.htm

 

[Groomz]

Non of the above. If you're going to go w/ a blow-through setup, get a Tial BOV. Its the best one out there and is going to be perfect for that setup. Anything else and you should get a 1G BOV.