02-17-2020, 03:03 PM
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#5
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Senior Member
Join Date: May 2012
Drives: 2013 Series 10 6MT FR-S
Location: Moreno Valley, CA
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Quote:
Originally Posted by triethyl
Similar sound with the JDL 4-2-1 here. I also initially thought it was a leak, and I may have had one, but even after completely re-torquing the system and checking for leaks the sound is still there. My current theory, based on what some other posters have said, is that the collector design of this header just has some flow dynamics that interact poorly with most front pipe configurations / resonator positions. I will probably swap over to a JDL UQFP (and maybe weld in an additional res? I don't think there are any catted + dual res FPs out there) to try to mitigate.
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I think your right on with your theory. It's a metallic tone right?
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2013 Series 10 FRS #553
RCE T2's, SPC LCAs -4/2.6 camber
JDL 4-2-1 EL, FP and OP, Tuned by Zach@CSG on e85
RR Wilwood Front/Rear Sport BBK, Motul 600 Fluid
ARC-8 17x9 SX2 GTs 245s/Koing 17x8 v730's 225's
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