I dont need to say much for this one:

S pipe inlet (behind cat):



S pipe outlet:


Crush behind resonator:

 

Talk about major restriction.

 

holy crap, that is really restrictive. I Really want to get an aftermarket b-pipe now.

 

I have both of those replaced, other problem areas?

What does the id of the bend over the rear axle look like?

 

I have a 2.5 to 2 (or 2.25?) gradual reducer in place of the s and the resonater/crush removed and replaced with stock diameter (runs until the bend before the axle). It still gets smaller over the axle but I have been reading into gradual reduction (Dave B mentioned it ahwhile back).

 

i'm looking to put a pipe to bypass all that.. think i should bend a new one to go over the axle while i'm at it?

 

did you replace this all with a resonated or non resonated b-pipe?

 

Thanks for the pics. I hated the stock B. Good thing I have a Cattman now.

 

I have a Stillen B pipe, which are non resonated.

 

Orly................

 

I have one, and it bolts after the S-section attached to the cat. At least I no longer have the crush section after the resonator!

 

Aftermarket b-pipe ftw!

 

My B pipe is crashed after the resonator exactly like yours.
Do you have any improvement in gas mileage afer replacement ?

 

What it the consensus on dyno improvements?

Naturally, for turbos it will be a much bigger difference, so I'm more curious about stock setups.

Dave

 

I love my cattman.

 

I dont know the diameter above the axle but since most of the piping is about 2" Im sure its smaller where its bent. I tossed that section away since its not that interesting to look at. The S pipe and crush/crimp on the other hand.....

The Courtesy pipe is nice but since it bolts to the S pipe its not a good design. Gregs Garage page had a good write up about that. He modded the pipe to remove the S pipe, good idea in my mind.

I didnt notice gas milage differences. I havent put all that many miles on my car lately. I would assume it would go up a bit, possible not enough to notice with my driving style. I get like 200-250 to a tank. If I go on a long trip Ill get 400 or so.

Motorvate.ca dynoed a b pipe, check his site out. I think the numbers were 4-8 hp at various points.

 

jsutter thanks so much for the exhaust kit dissections. this is really awesome, what are you going to dissect next??

 

all he has left is to skin the cat.

 

How does it sound now without a resonator? It shouldn't sound too bad if you have the stock muffler, but any aftermarket muffler will sound like ***. Budget B-pipe FTW.

 

do the budget/cattman bolt straight to the cat instead of the s-pipe? what's courtesy's site?

 

the dam maxima has to many dam pipes, Ypipe, Bpipe, Spipe, Test pipe WTF

i love how simple my other car is 4" DP/ 4" MP/ Apex Exhaust, Done and gains are 50-80rwhp + 2-3 hundred rpm spoolup increase, and the whole Exhaust system is as straight as an arrow with almost no bends

 

Next up is the resonator, actually I took pix of that too. I will post them up.

I have punched out 2 cats, one a Carsound (2.5" in and out) the other a stock (2.5" in and 2.75" out). After looking at both there is no reason to buy an aftermarket cat, unless your tune will ruin the inside. They dont do anything for N/A setups thats for sure.

My car has a stock muffler and is really loud for what it is. With an aftermarket, read unequal length, Y pipe the sound sucks no matter what cat back you run.

90% of the cat backs and B pipes will bolt directly to the cat. Courtesy, and others like Megan bolt to the S pipe, which is used on the 97/98's. The Courtesy pipes are no longer made but were available from Courtesy Nissan in TX. Cattman, Budget, Warpspeed, Stillen will all bolt up in place of the stock 4th gen B, ALL years.

 

http://www.courtesyparts.com

I believe they discontinued the Courtesy b-pipe a long time ago.

 

This is very good information to know. +1

 

the dyno results on motorvate are of an unresonated, non-mandrel bent 2.5, how much of a difference would it be compared to a resonated mandrel bent 2.5?

 

A resonated pipe wont affect HP numbers.
One thing I have noticed with my setup ( Warpspeed y budget unresonated B with a stock muffler) is that the gas pedal is alot firmer and is more sensitive. I love it. Any one else noticed this?

 

I sent you an LP custom for a reason.. Yet here you are still dissection things on your car.

 

how does it sound though with the unresonated b pipe

 

I have a Budget stainless steel y-pipe, coupled with a K&N panel filter.

I am thinking of getting a Budget stainless steel B-pipe, with the resonator, in about a year after I go through emissions testing.

I have a new OEM muffler and am not into noise.

Would I expect 4 to 8 whp gains like shown on www.motorvate.ca, or would the addition of the resonator minimize the hp advantage reflected in the dyno results?

 

Wow... thats a really neat bit of info. When i get a maxima ill have to look into that. Maybe thats what made my Acura Legend so sluggish?

 

Well it drones with little throttle and kinda makes a weird vibrate noise. Other then that at WOT it sounds nice and deep.

 

I know what you mean about the vibrate noise, it sounds like its vibrating but its not. I think i am just going to go with a budget b-pipe and maybe apexi ws-2 muffler. if not just keep my superturbo.

 

will a 5th gen catback bolt up to our car?

I think of it like this..
The undercarage of the 95-99 are ALL the same, BUT I believe the 99-03(if not, then 00-03) just bolt up before the before the axle appose to after.

SO... I jacked up the max and slid a stock 5.5 catback under the car, and EVERYTHING seemed to line up, the hanger right after the resonator was a LITTLE different, but still fit. So with a aftermarket y(with adjustable flange) I should be able to get the 5.5 cat back on there, right?




So if that works, should I be able to fit a greddy EVO II catback on there?

 

bump for conversation

 

Oh and b/c ppl wanted to see the resonator

 

that's stock resonator right?

 

time to replace my exhaust. Nice pics of the stock exhausts

 

yeah replace that and u fail emissions, even warmed up. i duno about ur local laws, but here emissions are pretty tight to pass

 

this is not a cat