4PAWS Posted March 8, 2007 Share Posted March 8, 2007 I know this seems to be a dead horse... asked MANY times. And yes have searched. But give this newbie (me) some direct answers, PLEASE I have looked at my stock exhaust system... 1. It looks to me like I have two cats in line then the muffler. Is this right? 2. If I go to a shop and have them replace my current exaust with a 'high flow' cat and a 'performance' muffler will he leave me with two cats still? 3. Is there really any improvement in the new stuff, other than better sound? I am looking for any horsepower gains I can get, at a reasonable cost. 4. I am seeing a consensus on a Flowmaster 50 series. Is this the predominant 'best' muffler going out there? LASTLY... 5. I see people mention a 'High Flow' cat, but no mention of specific names, models, etc. I have looked up cats at different websites, but they do not specify 'high flow'. What ones are you guys getting? :help: Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 8, 2007 Share Posted March 8, 2007 (edited) If in fact you have two cats, there is no need, just put one high flow cat and then a muffler of you're choice. There will be HP/Torque gains, depending on the setup you choose, although they will be minimal. Asking which is the best muffler is like asking what the best color is, everyone is going to have their own opinion as to what is "best" but Flowmaster is a descent brand...even tho I hate them cuz everyone and their mother has one (that's the mustang owner in me speaking). Personally I think a high flow cat on a pathy is a waste of money, youre not going to get any noticable gain by having a high flow cat, and if you combine it with a free flowing muffler, you may lose backpressure and actually hurt performance. If I were you, I'd possibly get slightly bigger piping, one regular cat, hell, keep one of the ones you have if they are still good, and a good performance muffler. Edited March 8, 2007 by Pavelow Leaks Link to comment Share on other sites More sharing options...
Slick Posted March 8, 2007 Share Posted March 8, 2007 i (and a few others) are running HF cats with FM 40 series and 2.5" pipe throughout. seems to be the most popular set up, and if you want HP... get headers (thorleys or pacesetter) here's a clip of my exhaust... and there are a few others in the pics/vid section Mini Me's exhaust Link to comment Share on other sites More sharing options...
Guest SuperSon Posted March 8, 2007 Share Posted March 8, 2007 (edited) I dig it when you guys post pics and videos .it gives me an idea what youre refering to Edited March 8, 2007 by SuperSon Link to comment Share on other sites More sharing options...
msavides Posted March 8, 2007 Share Posted March 8, 2007 (edited) Hey slick. sounds like you have the same high rpm rattle that I have on my 1991 pathfinder. Is your cat resting on the rear crossmember too? That is what i think is causing my rattle. Mark Edited March 8, 2007 by msavides Link to comment Share on other sites More sharing options...
nige Posted March 8, 2007 Share Posted March 8, 2007 (edited) you don't have 2 cats. One of them is a resonator which is uneccessary and can be removed. I have a universal fit 2.25" magnaflow cat and a flowmaster 50 muffler. Edited March 8, 2007 by skrillaguerilla Link to comment Share on other sites More sharing options...
LD50 Posted March 8, 2007 Share Posted March 8, 2007 (edited) I like mine 2.25" pipe, Flowmaster 40, no cat I also have a cone intake so it makes it sound cool too.. Listen here: Exhast clip Edited March 8, 2007 by LD50 Link to comment Share on other sites More sharing options...
4PAWS Posted March 8, 2007 Author Share Posted March 8, 2007 You guys are killing me. I need specifics. All the local shops I am calling are giving me a hard time. They are saying I need some specific cat ($269) he can't give me an exact price ($200+/-) just for the muffler? etc. !!! :oops: :X :furious: I have found 1 hope, a guy that will put the stuff on if I want to buy the cat and muffler my self. There are like a ton of cats and 10 different versions of Flowmaster 50 Series (in/offset out, offset in/offset out, etc) Can someone please tell me EXACTLY what model, size,brand, configuration, etc. Yes I am asking you to spell it out because that's what all my local rip-off artist are asking for. If I can't get help here, well, I just don't know :confused: Link to comment Share on other sites More sharing options...
LD50 Posted March 8, 2007 Share Posted March 8, 2007 you dont need anything specific, pick a muffler, pipe size and cat of your choice and tell them to install it! Link to comment Share on other sites More sharing options...
solid snake Posted March 8, 2007 Share Posted March 8, 2007 dude, take a look at your stock muffler. You need a flowmaster with the offset outlet, if you want to keep the stock specs, to get stock measurement just try to measure the inside of the exhaust pipe. As far as the hf cat, get one with the same measurement of the muffler. Link to comment Share on other sites More sharing options...
mws Posted March 8, 2007 Share Posted March 8, 2007 Cat: Dynomax Super Converter. 15033 if going 2.5" http://store.summitracing.com/egnsearch.as...9+115&x=36&y=12 15032 if going 2.25" http://store.summitracing.com/partdetail.a...15&autoview=sku Muffler: Dynomax Super Turbo 17733 if going 2.5" http://store.summitracing.com/partdetail.a...15&autoview=sku 17731 if going 2.25" http://store.summitracing.com/partdetail.a...15&autoview=sku Take pieces to a GOOD shop, NOT some national chain crap operation, but a mom and pop that does quality work and have enough smarts and experience to build custom. Should be under $200 for pipe and labor. That better? Link to comment Share on other sites More sharing options...
Casey.T Posted March 8, 2007 Share Posted March 8, 2007 I got Thorleys with 3" from the collector to the Flo-Pro and 2.5" out he back.... *Did I forget something in there???? nope was thinking the other County requirements.... Link to comment Share on other sites More sharing options...
Slick Posted March 9, 2007 Share Posted March 9, 2007 (edited) Hey slick. sounds like you have the same high rpm rattle that I have on my 1991 pathfinder. Is your cat resting on the rear crossmember too? That is what i think is causing my rattle. Mark actually, the section of pipe that my o2 sensor plugs into is still stock and dying, and that "rattle" was at 4k + rpm sly once i change that little piece of stock pipe, it will probably go away nothing rattles or rests on any part of the body/frame.. i HATE rattles don't be suckered in to thinking oyu need some "special" cat and stuff.. they're trying to skrew you. I paid $50 for a no name high flow cat, and $85 for my FM 50 series and *coughs* $400 for it all to be installed. (that price included muffler & cat also) Edited March 9, 2007 by Slick Link to comment Share on other sites More sharing options...
4PAWS Posted March 9, 2007 Author Share Posted March 9, 2007 :cool2: Finally some decent answers. And after a thousand calls, many web sites, and a few trips here and there I think I have found my answers... I found a shop with a down to earth person who was willing to listen to my ideas. He does not stock my exact preferences, but will do the work on/with what I bring him. So... a Manaflow Hi-Flow Cat for $90 mail order a Flowmaster 50series for $110 mail order... Hey "SLICK", you got a great deal at $85. WOW :o 2.25 pipe throughout This will total out at about $350+/-. I guess it is about the average cost as what you guys paid. I'll just be happy when I get it all done. Next up is the JWT pop charger and ecu. I'll have to sit back for a while before the headers and new cams. Thanks guys Link to comment Share on other sites More sharing options...
Guest SuperSon Posted March 9, 2007 Share Posted March 9, 2007 Slick the tip of your exhaust pipe is under the truck instead of piped out on the side. :confused: Are you getting any exhaust gases inside the cab? Link to comment Share on other sites More sharing options...
govols74n Posted March 9, 2007 Share Posted March 9, 2007 (edited) Once again heres mine, a Flowmaster 40, generic high flow cat, 2.25 piping......click on the pics for videos (and turn your sound up). Oh and if the shop doesn't know what type of exhaust is needed (specs), then the jackass should not be doing work on your vehicle! Edited March 12, 2007 by govols74n Link to comment Share on other sites More sharing options...
nige Posted March 9, 2007 Share Posted March 9, 2007 Next up is the JWT pop charger and ecu. I'll have to sit back for a while before the headers and new cams. leave the ecu tuning until after you do headers, intake and cams. It probably won't make a noticable difference until you add those parts. here's a cheap muffler. It took me about 30 seconds to find it. 50 series on ebay that's still too expensive for a cat. I paid less than that for mine in canada no less. here's a cheaper on. again it took me about 30 seconds to find it. Magnaflow cat on ebay If you ever want to cut through the bullsh!t that shops throw at you, call them instead of going in to see them and tell them to beat/match prices with local competitors. Just make sure you end up going to a reputable place. Most exhaust shops shouldn't have a problem with you bringing in your own parts. If they do, tell them you'll find someone else to do it for you. You need to remind them that they're the ones that need your business; not the other way around. I don't have a problem with it but others might tell you to check your tone. Especially for a new user that hasn't contributed anything to the community. Read first, then open your mouth. Link to comment Share on other sites More sharing options...
patzx300 Posted March 9, 2007 Share Posted March 9, 2007 I made some calls to some engineers at Nissan USA and according to them our cats are very low restriction. Apparently on the VG30E model, the cat is the same as the Z31 300ZX turbo. Link to comment Share on other sites More sharing options...
DryBear Posted March 10, 2007 Share Posted March 10, 2007 Once again heres mine, a Flowmaster 40, generic high flow cat, 2.25 piping...... Hey, that sounds pretty sweet, and yeah, thats some thick piping Link to comment Share on other sites More sharing options...
solid snake Posted March 10, 2007 Share Posted March 10, 2007 I know you guys are gonna hate me for this but I got the flowmaster for $75.00 at a local shop and I went down to mexico for the install with piping for only $40.00. Oh and BTW, they did a really great job at it too. Link to comment Share on other sites More sharing options...
speedbuggy67 Posted March 10, 2007 Share Posted March 10, 2007 my tailpipe just broke off my orig nissan muffler today guess it was due i have 213k miles on the rig, anyway on a naturally aspirated vehicle with such low HP a high flow cat doesn't make much of a butt dyno difference. If your doing headers back then def change the size of your piping and so forth. I measured the stock tailpipe and the OD of the pipe was a measly 1.75inch. That combined with a high restriction stock muffler and anything is an improvement. I love low end torque and adding a 2.5in pipe i feel is too large. I'd rather keep the power low inteh rpm range and i feel a 2in or 2.25in pipe would do the trick. I have my resonator removed and 2in pvc added to that so its getting more in just need t get it out. I plan on getting a dynomax super turbo muffler as they give off a Nice deep tone that doesn't resonate into the interior like most other mufflers and the fiberglass packing gives a deeper tone. maybe my age is showing in the fact i don't want something loud. I'll keep you posted after i have the 2in catback with 2in dynomax super turbo muffler installed. One important thing to remember is hot exhaust gas flows faster then cooler gases. Bigger isn't always better or you get the exhaust scavaging effect. Good luck. scott ps i do feel the case of a flowmaster is extrememly tough as far as banging off rocks as its been proven! Scott Link to comment Share on other sites More sharing options...
Slick Posted March 10, 2007 Share Posted March 10, 2007 a Flowmaster 50series for $110 mail order... Hey "SLICK", you got a great deal at $85. WOW :o 2.25 pipe throughout sly momma knows how to haggle. summit racing wanted $98 so i told nor cal. if they can beat that, they get my $$..... they beat it. they wanted my $$ Link to comment Share on other sites More sharing options...
Slick Posted March 10, 2007 Share Posted March 10, 2007 Slick the tip of your exhaust pipe is under the truck instead of piped out on the side. :confused: Are you getting any exhaust gases inside the cab? not really, on some days when the wind blows the right way when i first start her up some, yes. but other than that.. nope and no off road obstacles have managed to "attack" my exhaust system Link to comment Share on other sites More sharing options...
Guest SuperSon Posted March 10, 2007 Share Posted March 10, 2007 I made some calls to some engineers at Nissan USA and according to them our cats are very low restriction. Apparently on the VG30E model, the cat is the same as the Z31 300ZX turbo. seems like a waste of money to replace the cat with this high flow cat if the one we have on the pathy is still in great shape Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 10, 2007 Share Posted March 10, 2007 It is a waste of money, but I already said that. Unless you have a full new exhaust, headers included, you won't notice any gains in a high flow cat. Link to comment Share on other sites More sharing options...
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