09-10-2005, 01:09 PM
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Thread Killah
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Join Date: Feb 2001
Location: Greenville, SC
Posts: 5,835
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Changed my exhaust again
Went with 2-1/4" pipes from the headers to a dual 2-1/4" in single out 2.5" high flow cat and then the same as before out back 2.5"- a glasspack and flowmaster 80.
Mellowed it out quite a bit and totally eliminated the buzzing I was getting from 2500-3000 rpm's
Also gained back some low end torque on the butt-o-meter. Seems to jump off the line better now. Not sure yet if I lost any top end.
The mechanic thought I was a moron for putting a cat back on the car.
"you think you're going to gain power by adding a cat"
I think Harvey was right - you need some kind of expansion chamber for the low rpm exhaust plug to expand.
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Matt
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2015 BRZ Limited 6MT
92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting
92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles
19 Subaru Ascent Premium - -Hers !.
89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
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