Flowmaster's Force II Cat-back Exhaust System for the 2015 Ford F-150 (Part #817727)
#21
Flowmaster Force II Cat-back exhaust system, part #817727 installed on a 2015 Ford F-150 with a 5.0L engine.
Flowmaster Force II Cat-back Exhaust System - 2015 Ford F-150 5.0L - 817727 - YouTube
Flowmaster Force II Cat-back Exhaust System - 2015 Ford F-150 5.0L - 817727 - YouTube
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FlowmasterMufflers (09-21-2015)
#23
F150 Forum
Thread Starter
Most likely we do. You might have to start a thread in one of the Regional Forums to find out which forum members are running this system in the Denver area.
#25
F150 Forum
Thread Starter
#26
F150 Forum
Thread Starter
Updated Fitment Info for 2017 Models
We have confirmed that Flowmaster's Force II Cat-back exhaust system for the 2015+ Ford F-150 (Part #817727) will carry on through the 2017 model year for the same sub-model configurations as previously listed. If you have a question about this system, or any of our other products, don't hesitate to give us a call at (707) 544-4761.
#27
I had the Force II cat back installed today. I wanted a low rumble with minimal interior noise increase. The interior drone is way too much for me. I'm having the factory exhaust put back on tomorrow. I'm really disappointed. I had a Flowmaster 70 series on my Avalanche, traded the Av for the F150, and I only had a slight interior noise level increase.
I guess you live and learn.
I guess you live and learn.
#28
Senior Member
I had the Force II cat back installed today. I wanted a low rumble with minimal interior noise increase. The interior drone is way too much for me. I'm having the factory exhaust put back on tomorrow. I'm really disappointed. I had a Flowmaster 70 series on my Avalanche, traded the Av for the F150, and I only had a slight interior noise level increase.
I guess you live and learn.
I guess you live and learn.
I had an mbrp system on my last truck...the flowmaster is way more tame.
Last edited by trail hopper; 03-08-2017 at 07:50 PM.
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WVFan4 (03-24-2017)
#29
I have the 5.0 also. Thanks for letting me know about the "break in". The noise inside is just too much for me. I guess I'm getting to old now. Lol.
#30
Senior Member
The interior noise will definitely mellow out after a bit of use. The first day I put it on my truck I thought it was WAY too loud for what I was looking for. It calmed down noticeablely after a little use. I am getting too old for super loud exhausts (on my vehicles) as well. I like a little v8 rumble but am not looking to go obnoxious. This system definitely fits the bill...at least for me anyway.