VQ37VHR13

Hooray lol, glad you finally fell in love brother.

On the hand, im trying to buy the FI RHFC, would you guys recommend i get the 2.25", or the 2.5" since i have the MD? I'm trying to stay away from rasp. The guy told me if i want the 2.5, I'd have to order the one that's for the coupe.

Rochester

iTrader: (9)

The standard FI catback for the Sedan uses 2.25" piping, unless you upgrade to 2.5" on request. Whereas the Motordyne catback uses 2.5" pipes, period... right?

So if you were to look at this according to the catback you're matching to, get the cats with a 2.5" connector. However, it doesn't really matter, because they use the same flange bolt specs. And as long as you're going from narrow to wide, all should be right with the world. Fitment isn't really the issue.

My cats are 2.25" at the flange, matched up with 2.5" pipes. But I had the cats installed first, a full year before deciding on the catback. If I had known for sure what I was going to get on a later mod, or really thought harder about this, I probably would have asked FI to use 2.5" piping in the cats.

At least, that's how I'm remembering how this went down for me. Getting fuzzy as the years slip by.

VQ37VHR13

Yea, they use 2.5.

Thanks for the answers man, i appreciate it.

Jake85

Rochester

iTrader: (9)

Look at you downshifting with flappy paddles!

Sounds nice. Sport Sedan, baby!

SkyG37

Oooooooooo!!! That looks fun. I want to join.

Lol our cars sound exactly the same lol. If we drove next to each other and WOT, that would be insane lol.

But were you letting off the gas while upshifting ? It didn't seem to have that grunt sound to it. But overall, sounds great

SkyG37

Deleted. Repeat post

Jake85

Haha nice. Yeah that would definitely be fun. No, I just hit the rev limiter twice which is why there was that pause. It definitely grunts when paddle shifting properly.

VQ37VHR13

Sounds nice man, now you just need a popo detector if you don't have one yet lol. Do you plan on having it tuned?

Jake85

Thanks. Already have one of those hard wired in, it’s below the rear view mirror. Yes, my Admin Tuning intakes should finally be arriving Friday which require a tune. I’ll probably wait until spring to do that.

Calg37USMC

Sounds good Jake!

SkyG37

Small update: I noticed I get less MPG with the MD than my ARK But it might be my foot but I was pretty heavy with my foot with my ARK.

I also think I might have an exhaust leak by the cats as everyone else does. I'm going to check it out when I have more time.

Jake85

The mechanics at the exhaust shop that installed my Motordyne exhaust said they wouldn’t install the supplied gaskets that MD gave because they were cheap and thin and would burn right through. They used the existing gaskets since they were in good shape and of much better quality. My exhaust seems to be running tip top as well.

SkyG37

I did notice the gaskets seemed a little thinner than the ones that came with my my ark. The thing with my ARK, the gaskets that held the HFC + Y pipe was straight black. Like..... BLACK. And it was only those gaskets too, so I'm assuming their might have been a leak there or the heat was just too much for the gaskets.

I also noticed that whenever I am WOT, I sometimes notice a tin sort of sound in the rear. It sounds as if their is some sort of vibration due to the exhaust as well in the rear seats. Maybe its something in my trunk.

Also, ever since I got this exhaust compared to my ARK, a lot more random modified / regular cars try to race me like I'm supercharged or some****. Lol, yesterday an M4 came up speeding right up on my *** and let me say... THOSE m4's don't play LOL

Jake85

Haha! My exhaust has a tinny sound briefly as I’m accelerating past about 3500. It’s not bad, it’s kind of raw but I could still do without it. I think it may be because I only have one screw each securing the exhaust tips on. I couldn’t manage thread the other screws.