Originally Posted by 2kmaxi

okay i havent touched my car in awhile and i saw that i can get headers, a hi flow cat, and exhaust for 480 from custommaxima.com is it worth it to get that or get the 3in cattman for 800?????

i have an exhaust but dont kno what it is... bout it like that but it looks like a evo and its all rusted... in need of new exhaust and power but tryin to spend my money right

Originally Posted by 2kmaxi

okay i havent touched my car in awhile and i saw that i can get headers, a hi flow cat, and exhaust for 480 from custommaxima.com is it worth it to get that or get the 3in cattman for 800?????

i have an exhaust but dont kno what it is... bout it like that but it looks like a evo and its all rusted... in need of new exhaust and power but tryin to spend my money right

Originally Posted by Scottwax

Any of you with the 3" Cattman exhaust willing to post a video showing the sound level in car (windows up, stereo off) at freeway speeds? I do a lot of driving on freeways around here and make a few long road trips a year. A drone at those speeds would be a deal breaker for me unless Brian can make up a set with a quieter muffler.

Originally Posted by vastmax

Hey Scott, the Law posted some vids cruising on the interstate, i think they are on the first page.

Originally Posted by vastmax

Hey Scott, the Law posted some vids cruising on the interstate, i think they are on the first page.

Originally Posted by Scottwax

All the ones I have found (page 1 and 3) are drive-bys from outside the car. That doesn't tell me anything about how the exhaust sounds from inside the car. I had a magnaflow exhaust with a 24" resonator on my old Accord that sounded good until I got on the freeway and then the drone drove me nuts. Ended up having to switch to a turbo-style muffler to get rid of the noise.

Originally Posted by Scottwax

Okay, found the other videos. Seems to be a noticeable drone between 60-75. Under and above that, it sounds fine. Probably is, I am mostly between 65-75 on the freeway.

Originally Posted by sparks03max

That is pretty much normal for our cars. Almost any free flowing exhaust that makes noise at WOT will also resonate around 2100-2500 rpms, which just happens to be in the 60-70 range.

Originally Posted by WhoDatBuuL

im curious would the 3" piping do anything on the 3.0 or its just better to stick with the 2.5 piping

Originally Posted by Scottwax

Okay, found the other videos. Seems to be a noticeable drone between 60-75. Under and above that, it sounds fine. Probably is, I am mostly between 65-75 on the freeway.

Originally Posted by sparks03max

If you have an all motor 3.0 build (dandy style) or are ever considering nitrous, I'd say go for it.

It would be slight overkill if you just have the basics, though.

Originally Posted by WhoDatBuuL

Yeah i was thinkin it was overkill, but da one thing is i plan on puttin turbo in next year.

Originally Posted by CMax03

Yeah it was slight and I'll say less than my full 2.5" Cattman catback exhaust with Cattman headers....But I'm curious enough Scott that I'll try it out and install a little trick device for reducing DB's....if it's too loud for my taste! Also "The Law" (Lawrence) runs a test pipe which also adds to the db's.....I'm running Headers, Hi flow Cat, 2.5" Bpipe and Oem Muffler and soon to be 3" catback...I'll be using cone inserts if the exhaust is to loud! If all fails I'll sell it and reinstall the present setup which is awesome sounding (G35 like) during accelerating.....and quiet as hell during cruising in town or on the freeway....I'm really trying to see how the 3" catback drives in traffic, on the freeway, and if those 25whp/25wtq are obvious through out the entire powerband at part and full throttle operation.....???????

Originally Posted by CMax03

I'm really trying to see how the 3" catback drives in traffic, on the freeway, and if those 25whp/25wtq are obvious through out the entire powerband at part and full throttle operation.....???????

Originally Posted by Grand_hustle17

I don't understand why 25whp increase would be necessary for just a regular cruise, unless there is some competition for partial throttle and what car moves faster with only a 20% throttle all gains I'm sure is only going to be proven at WOT as that's only when its necessary

Originally Posted by WhoDatBuuL

i know this is a lil of the subject , but its still cattman talk , i was wonderin how come there aint no solo tip exhaust system for the 5th gens from cattman??? i want cattman but i like the obx exhaust look.. im not a fan of dual tips !!!

Originally Posted by MaximusMorpheus

Stick with the stock muffler and change the rest, no drone for me...

Originally Posted by CMax03

I know that @ WOT the numbers are awesome, but if you're not @ WOT 100%...like most of us on a daily basis...What's the performance like? I really appreciated sactown and the 50-60, 60-70, and 70-80 mph highway runs and cabin db's on YOUTUBE. I was really impressive but unsure if he has headers or just a Ypipe. I have a 2.5" Cattman that is awesome sounding no doubt but a bit loud for me and my wife during 70-75mph highway usage for 4 hrs...I would love for some of you guys that have the 3" catback with headers to respond to my question regarding part throttle operation and how responsive it is at LOWSPEED PART THROTTLE OPERATION! I'm just trying to get some feedback cause I would love to purchase the 3" catback if I feel it's going have awesome driveability during part throttle operation.....

Originally Posted by CMax03

We know it made WOT throttle power increases, what about part throttle operation???????????????? That's my Question!!!!!!!!!!!!!!!

Originally Posted by Grand_hustle17

It does man... I thought the law said that awhile back???

Originally Posted by sparks03max

Originally Posted by CMax03

The price is stationary if we had 20 orders the price will still be the same...If we had 50 orders as a group then it'll drop...



Can you be more specific in what you're responding/referring to please...



I could care less about The back Pressure Myth...I'm concern about the gas velocity @ idle, part throttle and WOT! I lost gas velocity with my 2.5" Cattman and the Cattman ypipe installed @ WOT, compared to the OEM. I felt exhaust gas velocity (WOT) exiting the Oem exhaust system at least 20-25' behind the vehicle during a dyno pull and it was strong. After installing the Cattman Catback the exhaust gases were barely felt at 15' (WOT) and the exhaust stream was no where close to the Oem gas pressure nor velocity. There is a limit on how much back pressure is allowed before it becomes restrictive but gas velocity is more important to me.... Where are you (The Law)? I'd think you could answer my question along with many other N/A VQ35's equipped with I/H/E(3")!!!!
Pretty please... anyone?

Originally Posted by CMax03

won't get involved in the backpressure discussion except to note that, all other things being equal (in terms of engine performance), the exhaust velocity has to decrease anytime the tubing diameter is increased so I don't see how that would - in and of itself - be a negative indicator. [Try narrowing it to 1", I'll bet the gasses really scoot!] But seriously, of course there is a point where a lack of backpressure will negatively impact engine performance, but I don't know how, or at what point, the degree of exhaust velocity loss would correlate with the "tipping point" of performance starting to decline.

Brian
Thanks Brian for the price reduction possibilities that sounds awesome if we had that many interested....I spoke to "The Law" he had nothing but good things to say regarding this 3" exhaust system! I was able to see that Sactown YouTube video while cruisin the freeway and again I was really impressed with the low noise output in the "famous drone zone"! Maybe this is the missing link along with the TS reflash....I don't know....I'll be weighing the - & + aspects and you'll get a call about what direction I'm gonna go! If I was the only person in the equation I would have had one during the first ordering/mfg session! But I have a wife that actually drives the car more than I do....And this is our highway car going to Louisiana quite often so I'm really trying to see what kinda behavior the 3" exhaust exhibits cause the 2.5" with headers was too loud for my Wife's and I taste that's why I reinstalled the Oem trick muffler.....(Yall probably think I'm a *****)...so let me think a little and I pray that I can make a really good decision...
Brian thanks for making products that are so beautiful I can't sleep at night...
CMax03 (Carlton)

Originally Posted by Grand_hustle17

I'm srry, either some ppl have never ever modded a car before or something cause I can see why some question is being asked but there are some that just leaves me to think ppl have no common sense my goodness is it really that bad at times???............. hey I got a question, I bought some gas for my car, do you think I should press the trigger on the pumps nozzle or is there a better way of gettn the gas out???.... my goodness ppl... cmon man... matter of fact stop wrecking the OP's thread.... he is looking for orders for this 3" catback system, if u don't know about the catback system and the pro's and cons then maybe you shouldn't be buying it.... go search damn it

Originally Posted by sparks03max

They don't respond because your "back-pressure" mental failure is something that people ignore, maybe. That's my first guess.

The Law has posted videos of how it sounds at partial throttle and different RPMs. That's as much of the street manerism as you need to know, as even at partial throttle plugging your exhaust with a potato (TO INCREASE BACK PRESSURE, YO) will not gain you power.

So here you go, a 3" will increase power throughout the RPM band and back pressure is a joke. Got it?

Let me also put it this way. I gain part throttle power and responsiveness from driving around with open Y-pipe, no cat-back even attached. That stands to reason there is enough "back pressure" (lol) with just headers to save the world from blowing up, lowend power from being lost, and my exhaust valves from burning.

Originally Posted by CMax03

I don't think that was a statement that was any different from the ones I made from the first group order of 3" exhaust....I asked and asked the same exact thing regarding part throttle response in traffic and whp and yalls stance was weirdly too say different....Unbelieveable!!!! But like I stated a million times before I'm into tractability and driveability and since there were so many responding that did not have and so few that did have a 3"catback...I'm gonna find out on my own and I'll deal with whatever I need to....Also for you GH17 everything isn't for competition and if I can increase my part throttle whp it increases my fun time but you wouldn't know anything about driveability/tractability it's pretty freaking obvious.....

Originally Posted by RLStrick756

With the ability to have variable exhaust diameter, can you have the best of both worlds? And, that is also normal? "Almost any mod you make to give yourself a better powerband at the track/WOT (midrange-topend) will make a sacrifice in the lowend, and sometimes partial throttle." So, there be an advantage across the entire powerband, if a device is added to the 3" exhaust to make it a variable exhaust? Would the 3.0 engine have only a slight or only WOT improvement?

Originally Posted by sparks03max

Dude if your goal with this car is part throttle/low rpm/highway driving power and response, IMO you've gone in the wrong direction getting a 3" exhaust... and I sure hope you don't have an intake or vias delete, as those would detriment that sweet feeling you get when going 10% throttle @ 2500 rpms with the stock intake and working VIAS

I don't see how my statements are now "completely" different, either... I kicked your back-pressure crap back in your face, and I still feel that way since there's no such thing. Smaller piping IS more optimal for low rpms/part throttle, but like I said my car still feels quicker with the cutout open under those conditions, so I can't say it is a very noticeable difference (probably because the headers/ 2.5" Y-pipe keep velocity up regardless of what pipe is behind it).

Seriously though if you want to increase your fun time, try pushing the pedal down a little further. Shooting for increased part throttle WHP makes no sense when you can just press the throttle more with mods that increase power where it matters.

Originally Posted by CMax03

Yeah my story hasn't changed but I see your hypocritical tendencies even if you're blind to your own statements/writing! You brought up back pressure, I've always stated my interest of not only WOT but most importantly part throttle operation since that's where I spent most of my time when driving on public roads....Now as for you and the other arsehole, you two must drive at WOT 100% of the time...cause you have no concept of increasing your performance across the board other than @ the drag strip.....But don't let my personal experiment bother you and your own personal agenda regarding your own 3" catback! Hell I don't know why you're all my nuts or worried about my catback whether I drive at part throttle or full throttle, it isn't gonna affect your personal life....But ppl like you always live their lives with their mouth wide open and your ears plugged....go suck on someone's jock, cause I'm getting tired of your smart **** remarks doughboy!

Originally Posted by CMax03

I'd think we're way beyond this dicussion now, my catback will be here more than likely Tuesday.....The Law convinced me that it's a awesome mod and he felt better response thru out part/full throttle and if he could have done anything different all over again it would be to order this even earlier than he did....I'm after the full throttle muscle and I'm curious about how it will perform with my present mods plus my intake spacers.....at part throttle as well! I realize that there is some giving and taking when modifing engine and engine systems but there are ways to still improve the combination of parts in which a person uses to increase their whp....I've been playing with engines along time and I fully understand the operation of components and that's why I had so many questions about this 3" exhaust for the past 1.5 yrs, cause it was defying the law of physics/rule of thumb when considering an exhaust system size for your N/a or force inducted vehicle....I presently have a force inducted Dodge Shelby Charger so I'm well aware of all the tricks of the trade but this VQ35 is a slightly different beast and I'll see if this suits me needs or not...I'm sure I'll be able to lower the db enough to enjoy some highway/in town traffic driving....thanks for your concern Sparks, sorry for firing away at you but I'm ready to end all the suspense and curiousity regarding this setup...Scottwax, I'll let you know as well....We're both on the same page....We live in Texas and there is alot of freeways that we drive on around here and when you're a bit more mature like we are all that noise can be a PITA....thanks guys!

Originally Posted by wyche89

I haven't read through the 5 pages of this thread yet, but I'd like to answer your question incase it hasn't been answered yet. I don't have the cattman 3" exhaust, but I do have a custom magnaflow 3" exhaust. I'm assuming that cattman's power increase will be the same, if not better than mine, so I'll tell you what I experienced with my exhaust. I gained an impressive amount of power in partial as well as full throttle.

Notes:

1. This is according to my butt dyno, as I have not had the car dynoed yet.

2. I had other supporting mods, which were short ram intake, and cattman headers/y-pipe to aid my performance. If any of those are stock on your car, then it might change your performance results.

Hope this helps. Let me know if you have any questions.

Originally Posted by Cattman

I'll pop up to mention that there are 5 backorders already for the next batch, and we'll make that happen as soon as we have a total of 8. If you're thinking about moving on this system, or know someone else who might, now is the time to call. It may be a while before we make these again.

Brian