mensur724

hey guys im thinking about putting a hi flow cat on my maxima to compliment the cold air intake i put in it but the thing is I want to know how does the car sound with the hi flow cat. Does it make a nice loud and deep roar or does it barely make a difference please if anyone know could they post Thanks.

IceY2K1

iTrader: (3)

Got header? Got ypipe? Got Bpipe?

I've seen a VQ30 with POP, headers, Bpipe, and no rear section, lose power with an aftermarket cat.

So, unless you've got a pretty high flowing exhaust, I wouldn't bother.

Max20SE00

iTrader: (3)

if you were to run a high flow cat its basically just a straight pipe right? Would this cause a check engine light to appear?

IceY2K1

iTrader: (3)

A high flow cat is not a "straight pipe", they all have their own type/style of honeycomb whatever inside. Some apparently are more restrictive even though they appear more streamline/shorter then OEM cats.

No, on the CEL, if you're a Cali-spec.

Max20SE00

iTrader: (3)

I am fed spec...doe sthis change anything.. I got a cel with a y pipe that I had on, but I think it was just a bad o2 sensor

RichP23

iTrader: (1)

Totally not worth it. I put one in and it actually blew within 6 months (Not saying it's because it's a high-flow... Don't really know why it blew). I just put a regular cat back in and notice really no difference.

IceY2K1

iTrader: (3)

Is your rear 02 before or after the main cat?

Also, curious on the ypipe, it eliminated the firewall side precat, correct?

Max20SE00

iTrader: (3)

i'm not sure about that, install was done by someone else, and I am not very smart when it comes to exhaust. I think the y pipe eliminated some precats.

IceY2K1

iTrader: (3)

Okay, I don't remember off the top of my head anymore where/how the Fed specs are, but if you removed the precat and then remove the main cat and the rear 02 is downstream of the main cat, you'll get a check engine light with a straight pipe. Maybe not with a high flow cat or with a precat still in place.

mensur724

all i want is for my max to have a deep roar something to rival with the g35 coupe's sound and the fx but i only have 250$ spending cash for it what do you guys rcomend i thrown on to give me this roar i have heard that the best thing would be a flowmaster muffler but i cant seem to find one that would fit my maxima and has the dual tip style i only see those big huge mufflers that they put on crummy honda civics ne help is appreciated. Thanx

Puppetmaster

iTrader: (48)

Start with a y-pipe... since ya have a VQ30, it'll give ya some nice gains too.... check out Soonerfan's video in his signature....

http://members.***.net/jttaylor155/C...st%20Small.wmv

And another thing, with a smaller engine and different exhaust components, I'm not sure how close you're gonna get to the G35's tone...

mensur724

any placed you know i could get a nce deep muffler something with a dual tip?

sublimer

iTrader: (7)

Remus makes some nice sounding universal mufflers. Dual tip design.

darrick04

I just had the high flow cat installed last week and I noticed a slight difference in sound, a definite increase in accelaration and also about 35 miles more to my tank than normal. I didn't believe the average mpg increase they are supposed to create but it saves me money in the long run so it is a wise investment for that purpose atleast!

tothemax319

You could get a muffler shop to custom fit a universal single inlet, dual outlet flowmaster series 40 muffler with the tips of your choice. This would be the best choice if you're on a limited budget. I'm planning on a custom 2.5" cat-back with a flowmaster series 40 and magnaflow 2.5" rolled tips. I'm planning on having it done at Lou's Custom Exhaust (if you're familar with this chain).

IceY2K1

iTrader: (3)

Whose high flow cat? What mods do you have?