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FED 387 · 02-20-2017, 12:51 PM

Both make "good" springs--- too many variables to ask that question--- need info on Cam lift- suggested spring pressures- RPM range engine will be operated in/spring diameter/installed height etc./spring treatments polishing etc. etc.-----might want to look at PSI also compare the 3--- PAC & PSI generally are a step above Manley due to their steel/manufacturing treatments etc. etc. but I'm not saying to use one over the other it all depends on your set up---FED 387

02-20-2017, 12:51 PM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,420 Likes: 528 Liked 332 Times in 180 Posts	Re: Pac vs Manley Both make "good" springs--- too many variables to ask that question--- need info on Cam lift- suggested spring pressures- RPM range engine will be operated in/spring diameter/installed height etc./spring treatments polishing etc. etc.-----might want to look at PSI also compare the 3--- PAC & PSI generally are a step above Manley due to their steel/manufacturing treatments etc. etc. but I'm not saying to use one over the other it all depends on your set up---FED 387