[DaemonJ]

I was looking at Super Six Motorsports' website today and they offer 3 stages of cylinder heads for the 4.0L V6.

Does anybody have any experience with these and/or have an idea of what kind of HP and torque gains each of these stages of cylinder heads provides?

[GreenFaleen]

I wouldn't get stage 3 for a NA car stage 2 tops.

[DaemonJ]

Originally Posted by GreenFaleen I wouldn't get stage 3 for a NA car stage 2 tops.

Yeah, that is what I'm looking at but I'm wondering what the difference is in numbers to see which stage is more worth the money. I'm not going to pay an extra $500 to get 10 HP, you know what I mean?

[GreenFaleen]

well stage 3 is normally geared toward a Forced induction motor. Where Stage 2 is a NA manual, and 2+ is NA auto

[itschristorres8]

with ported heads which is pretty much stage 2 with some other improvements you should see about 40hp. if not just email them

[Texan_Stud]

40 hp is a noticable difference and not to mention it improves the "impact" of your other modifications meanin you will probabaly see more power.. especially with a good flow exhaust. since what your looking at adds more air and fuel you will probabaly end up needing a bit bigger injectors

[DaemonJ]

Originally Posted by itschristorres8 with ported heads which is pretty much stage 2 with some other improvements you should see about 40hp. if not just email them

I had emailed them shortly after posting the topic thinking along the same lines.

I asked about PowerPaks and the cylinder heads for the 4.0L V6 and following is their response.

Originally Posted by Super Six Motorsports We do not offer the "PowerPak" per se for the 4.0 SOHC engine, but we do offer ported cylinder heads in Stage 2, Stage 2+, and Stage 3, regrind cams, forged pistons, billet aluminum connecting rods, etc. Performance gains vary depending on individual mods, tuning, etc. Stage 2+ seens to be the preferred setup for daily driver naturally aspirated cars with horsepower gains of about 20-25 RWHP and substantial torque gains. Stage 3 is mainly being used by guys with blowers, and power increases approaching 100 RWHP have just been reported by a customer who has attained 440 RWHP with our Stage 3 heads and regrind cams and a ProCharger supercharger.