What do you guys recommend? I've read interesting dialogue both ways that leans further towards the HX. By porting H1C, I mean matching the gasket. I don't do alot of towing. Mainly around town driving.
Thanks for your thoughts,
Randy

 

The only housing most folks bother to port is the 12 cm.

 

I gasket matched my 16cm housing, took about 10min, and also ported my 12cm housing. Which took an hour on the mill and a couple hours with the die grinder. and they both spool about the same, and provide the same amount of WOT boost and egt's. Not really any performance difference that I can tell.