200cell cats plus Xpipe =loud and rasp. How to fix the sound

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#21

10-19-2018, 05:04 AM

steve_k_xk

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Excellent!!

And where is the placement of them is it pre or post the x-pipe

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#22

10-23-2018, 02:23 AM

AlexJag

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A pair of 18 cherry bombs definitely helped some
Placement is right downstream from the xpipe.
After driving for a few days , I must say it sounds nearly perfect with fuse 19 back in. Nice deep rumble at slight rpm increase yet no drone. At idle it's quiet. At full throttle it's throatty but not overbearing. Happy with the outcome!

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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph

Last edited by AlexJag; 10-23-2018 at 02:26 AM.

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