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This is my setup. https://www.mustang6g.com/forums/threads/kooks-1-7-8-catted-headers-varex-x-force-axleback.117979/#post-2475415

I installed Kooks headers and Varex axleback because I wanted the best of both worlds. Loud and quiet when I want it. Don't know of to many Mustangs with this setup but it's definitely different. Loud as hell with the valves open and stockish when closed. Installing the headers was a 12hr...

Ooooopppps! Thanks!

Delete..

I'm on sportlines with Kooks catted headers / Varex axleback. No scraping.

I installed 11-14 Xforce axleback with a resonator delete Xpipe on my S550. Quiet as stock when closed, aggressive when open. I have a vid on YouTube "dcs550 mustang". Just skip to the end for the exhaust sound.

Do you have any exhaust vids of your setup? I added the Varex to mine in preparation for Kooks long tubes. I have a vid of my setup on YouTube, search for "DCS550 Mustang" My video skills suck but you get the point.

I don't have headers yet but they are on my short list. I recently installed 11-14 Varex Xforce axleback on my S550 with a resonator delete X-Pipe. They are quiet as stock closed and just a little quieter than the Borla ATAK catback when open. I think they will be a happy medium when I go catless.

Anyone know of a Varex X-Force exhaust dealer with Black Friday discounts? Thanks!

I just upgraded my Roush 670 Stage 1 w/ stock Roush tune to the below mods. Don't have numbers but it is scary fast now. I mean she freaking flys. Anyone have a guesstimate on RWHP? I'm thinking at least 620+ Lund Tune 79mm Pulley DW95 Injectors 6510 Spark Plugs VMP Fuel Pump Booster IAT...

Praying for you brother!

My plans are the 79mm pulley, PMAS CAI and other supporting mods. Hopefully she'll whine even more.

I think it would sound awesome though.

Yeah it's a lot better than not having whine at all. I would be careful doing it with the turbo setup. Heat..

That's on my Mod list. Thanks!

17 GT with a Roush Phase 1, 85mm pulley, Borla ATAK with x-pipe and 3.31 gear. Still on the Roush tune. The supercharger had very little whine even with the filter cover off, so I removed the hood liner and was surprised how much I can hear it now, even over my loud exhaust. I've been running it...