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ProMaxx 440 head? #1670657 09/13/14 07:28 PM 09/13/14 07:28 PM
Joined: Jan 2003 Posts: 525 Shannonville, Ont Blown 68 R/T OP mopar
Blown 68 R/T OP mopar Joined: Jan 2003 Posts: 525 Shannonville, Ont	Saw these on Jegs site and youtube. Are these the same as the Sidewinder heads? Anyone have any info on these? There's a guy on youtube raving how nice the sbc Pro Maxx's are, wonder if they are any good especially for blown application with 750+ spring pressure.

Re: ProMaxx 440 head? [Re: Blown 68 R/T] #1670658 09/13/14 08:10 PM 09/13/14 08:10 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing master
Dunnuck Racing master Joined: Mar 2007 Posts: 3,300 Northern Indiana	They are basically the same casting but the Sidewinder head is supposed to be sold with top quality valves, springs, etc. I don't know personally at this point what quality those components are in a Promaxx but hope to find out Keith www.dunnuckracing.com

Re: ProMaxx 440 head? [Re: Blown 68 R/T] #1670659 09/13/14 09:29 PM 09/13/14 09:29 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 master
1Fast340 master 1 Joined: Feb 2007 Posts: 2,578 sweden	Quote: Saw these on Jegs site and youtube. Are these the same as the Sidewinder heads? Anyone have any info on these? There's a guy on youtube raving how nice the sbc Pro Maxx's are, wonder if they are any good especially for blown application with 750+ spring pressure. you might find some more information in this thread given some time or atleast get some information from the op https://board.moparts.org/ubbthreads/show...rue#Post8269003

Re: ProMaxx 440 head? [Re: 1Fast340] #1670660 09/13/14 09:43 PM 09/13/14 09:43 PM
Joined: Feb 2004 Posts: 855 ontario canada kingston aspenrt360 super stock
aspenrt360 super stock Joined: Feb 2004 Posts: 855 ontario canada kingston	so the shopping has begun eh? 2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4

Re: ProMaxx 440 head? [Re: aspenrt360] #1670661 09/14/14 03:41 PM 09/14/14 03:41 PM
Joined: Jan 2003 Posts: 525 Shannonville, Ont Blown 68 R/T OP mopar
Blown 68 R/T OP mopar Joined: Jan 2003 Posts: 525 Shannonville, Ont	Keith I was wondering if they(ProMaxx/ Sidewinder) would hold up to a high spring pressure boosted application, are the shaft mounts built up like Indy EZ??Heard Eddy;s are weak in the shaft mounts and not recommended.

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