They are offering to do Your muffler setup exactly the way My Perf. Exhaust shop did mine with 40 series flowmasters. Best sound I have ever had on any of the other vehicles I have had including My 99 silverado that I drive everyday. Consider I'm running headers also so if you are not Yours will run a little quieter than mine. I can not hear mine on freeway cruising or very little. idle sounds great and deep. Normal driving gives You a good deep sound. When You get on it hard then You will hear it loud and deep.
Make sure they go on over the axle and not turn down in front of axle. In front of axle will put to much reverb in the cab. Go over axle and have them tuck tail pipes in just about the same place factory is with tips pointing down at a 45 degree and You will not have any trouble when off roading. They should put new 40's right where the factory stock muffler sits. The factory muffler is so big the 40's fit right in it's place with no problem at all.
Hope this helps.
TAZ (Rick)
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05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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