Originally Posted by Nut_N_Much

Okay, here it is. My SC is on the table, wiating for boost pulley.
2 Inlets on the Y:
Inside Dia 2 1/2
Outside Dia 2 7/8

Single outlet on the Y
Inside Dia 2 5/8
Outside Dia 3

Reducer Boot from Y to SC intake:
2 1/2

SC outlet:
Inside 2 3/8
Outside 2 7/8

Intake tube from SC to Throttle Bodies:
From SC side 2 5/8
From (2) throttle body side 2 1/2

Of note, the center of the MAF Mount is 2 inched from the K&N filter. If you need more let me know! Hope this helps..