PRJ rails > ZZP rails but there is a cost for quality.
Yes you will need a machined LIM.
With my mods and a 2.8 pulley, I'm not seeing KR anywhere. This is also a DD. It's just that the Stage 3 with that Ultem lower half worked so well I was amazed the first time I laid my hand on the blower after driving from Indy to St Louis non stop IIRC. Anyway the stage 2 works very well IMO.
As far as installing goes. My car was down for 3 weeks, I believe. However, I only worked a couple hours each night, did gauges at the same time, am real anal about stuff, didn't install like most people do, etc. I believe most will do this in a full day or two.
PRJ rails PRJ Performance Gen3 L67 Aluminum Fuel Rails Kit: 3800 Performance
Intense sells injector spacers, that unlike ZZP's supposed to work with more than just the SSIC INTENSE-Racing.com: <b><i>INTENSE</b></i>™ Fuel Injector Spacer Kit
The only thing(s) I have against the ZZP rails are, the cheap regulator known for failing, the mounting is less than sturdy, and a fitment issue that they finally refunded me for.
