This exhaling sound, does it only seem to happen when under boost and sound like its coming in from the rear vent?
What's you're hand calcs say? I used to be within 1 mpg of computer, last tank I was off by 2.5+.Shockedby the 15% increase in fuel economy with the single outlet axle back pipe. It is loud at WOT, but very tolerable on a 5-6 hour highway drive (365 miles @ 70 MPH average speed) with 23.1 mpg on a 2 DOOR OBX 2.7 in sport mode 4A. Speeds were between 65-85 for the majority of the trip.
That's just unreal. 23.5 MPG?!? At those speeds?
Dead silence from @Holley Performance Co.
It was within 0.43 MPG (0.3 gallons) after 365 miles, but I only did this for that one trip... I haven't bothered to repeat the experiment. The calculator was optimistic (23.1 mpg calculated vs 22.67 actual) - I hadn't bothered to calculate it by hand until today because I knew it was fairly close and certainly within a margin of error that could have been partially blamed on my filling the tank at different pumps/temperatures/and my own filling technique. It isn't scientific.
2.3 or 2.7?
Too loud? What’s next?
Yeah, too loud. I liked the sound when it started up but that’s about it. There were just no breaks from it. It would be cool if you could turn it on/off.
I put on the MRT trailrated system a few weeks ago and while it sounds good when you give it the beans I just cant take the low boomy tone when driving easy. It's not bad with all the windows up but as soon as you put them down along with the top it's very annoying. I just ordered the AFE Apollo GT with single tip cat back because it has 2 mufflers. Im crossing my fingers this will the best solution for me. It's under 600 bucks right now.
Please let us know. This is my feeling as well. I want to hear it when I want to hear it but not when I don’t.
I guess teh flowmaster mounts and isolators replace the factory.Ive had my FX installed for about a week now on my 2.7L. It sounds great & no drone at all! It will never sound like a v8 but this sounds good for being a small V6.
