Ace Muffler : 4 into 1 Header - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

AceHeader-MT · 01-08-2014, 05:53 AM

We decide to make a 4 into 1 header to test if it improve from our 4-2-1. And the 4 into 1 ready make good power overall. Because the engine ECU did not tuned, so we test up to 6800RPM, and engine still goes very strong.

My 4-2-1 header: http://www.ft86club.com/forums/showthread.php?t=50211

bfrank1972 · 01-08-2014, 09:14 AM

Very nice work! Quick compare to the original 4-1 it looks like the original might have a better overall curve, but it's really hard to tell especially when both are untuned (correct me if I'm wrong on the tuning part). I would think the 4-1 design would have a better top end, but so many factors come into play. Workmanship looks excellent, any chance you could capture some video of how it sounds? Keep up the good work and let us know when you want to start selling

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01-08-2014, 05:53 AM	#1
AceHeader-MT Senior Member Join Date: Oct 2013 Drives: 2012 FR-S Location: Taiwan Taichung Posts: 225 Thanks: 359 Thanked 695 Times in 159 Posts Mentioned: 19 Post(s) Tagged: 0 Thread(s)	Ace Muffler : 4 into 1 Header We decide to make a 4 into 1 header to test if it improve from our 4-2-1. And the 4 into 1 ready make good power overall. Because the engine ECU did not tuned, so we test up to 6800RPM, and engine still goes very strong. My 4-2-1 header: http://www.ft86club.com/forums/showthread.php?t=50211

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01-08-2014, 09:14 AM	#2
bfrank1972 Senior Member Join Date: Jul 2013 Drives: 2013 FR-S Argento Location: Westport,CT Posts: 1,855 Thanks: 517 Thanked 1,041 Times in 616 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Very nice work! Quick compare to the original 4-1 it looks like the original might have a better overall curve, but it's really hard to tell especially when both are untuned (correct me if I'm wrong on the tuning part). I would think the 4-1 design would have a better top end, but so many factors come into play. Workmanship looks excellent, any chance you could capture some video of how it sounds? Keep up the good work and let us know when you want to start selling Sent from my iPad using Tapatalk - now Free

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