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okay got the lowdown from the horses mouth as they say.
simulators conditioners not needed if you have cats installed as I do. O2 conditioners on my car were removed.
Unless your car is from out of the US, after market cats don't clean the exhaust enough to not trigger a cell. If you get after market headers, you'll need a simulator/conditioner or a tune. Even if you install after market cats.
IredSF, can you elaborate more on the setup? The QES drones loudly at low rpms. How did the sound inside the cabin change? Is it louder? Does it drone more or less? How does the exhaust note sound now? I heard a little rasp, it still sounds bad ***! And it looks like it pulls harder. Also, on the install! Did you have to modify anything to the exhaust? For it to bolt up. Thanks in advance!
okay can authoritatively respond now. Grounding issue resolved, o2 conditioners uninstalled and violla, car runs as good as it did first time I drove off after header install.
short answer my initial impression was CORRECT, WAY LESS DRONE, way less VIBRATION, only pure EL Header and Qes exhaust sound!
im not kidding huge difference, worth it alone simply for removal of the drone/ resonance.
now that the car is all heathy again, it's easy to tell. It's unquestionably BETTER LIKE 90% eliminated.
ill get more sound clips up now that's she's healthy.
thanks to mike @FIGS and Simon @ rr for helping remote diagnose and resolve. Really appreciated it from both of you guys. (mike u nailed it, loose ground connection in wire bundle)
hope that helps folks figure out what's best for them
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Great to hear you got your issue resolved, IredSF.
Scheduled an appoinment for 9/13 to have my long tube el headers installed. Will be ditching the aftermarket cats at the same time, f the smell. Was going to install 'em myself next year, but after hearing how they sound I can't wait.
__________________ Redefining Lexus Aftermarket Parts Since 2001 -- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting 2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions
Sub. Interested to see where this goes. I have been holding off on exhaust and headers, with all the new developments of the tune and supercharger etc.... Plus I am still really undecided on which way I want to go.
working on fabbing the rest of the exhaust in Ti to complete the sound.
__________________ Redefining Lexus Aftermarket Parts Since 2001 -- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting 2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions