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header suggestions please

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i bought a set of bassani midlengths for my truck and when i got them i noticed the cats on 06's were moved further up in the y pipe, they are about 4 inches from the manifold flanges, they arent parallel with the ground like the older y pipes, so they wouldn't work, but i found a friend with an 05 y with the cats mounted down lower, horizontally, so i traded him. so i called bassani and they said that they have never seen this problem with the cats being mounted higher in the y pipe and that they are sure that their headers are smog legal on 06 models, and if i used the 05 y pipe it would be fine, so i took that and went on with the install. well 3 weeks ago i tore into the truck and found another problem. the passenger side header would not fit, the header flange wasn't even flat on the head and the #6 primary tube was on the frame, i had to push it down just to get the bolt holes to line up, but of course we didn't find this out till we had the drivers side header torqued down...anyway after going round and round with them about why it wont fit, and sending them numerous pictures, they said send them back for a full refund, i finally got the ups info from them Thursday and had them sent off. i would have had my money back already but bassani is closed on fridays for some damned reason. i've left the truck down because i was wanting to put headers on it and i was looking into getting a set of thorleys tri y's (the 310y's) but even though they have a carb number stamped on them and they reuse the stock (05 and older) y with cats and all they technically aren't smog legal for my truck (i called and asked thorley directly). i thought about getting them and doing it anyway and trying to sneak it through and see if they will pass it but when i go to smog it, if it doesn't pass the stock stuff will be hacked up to fit the thorleys and it will cost a ton of money to get it put back to stock for smog. so i was thinking about getting a set of pacesetters and their ory but having a set of cats installed in it so i can keep the stock stuff for smog time all together in one piece, but basically the only thing smog legal i have to work with at this point is shorty's so i would just rather put the manifolds back on and spend the money elsewhere.
sorry for the essay it has been a disgust filled couple of weeks... anyway if anyone has any suggestions...
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Discussion Starter · #4 ·
this thread and the links in it show all about it
http://www.gmfullsize.com/forum/showthread.php?t=158558
i know the dynatechs have cats but no carb number,same with arh's, same with sw's,they all have a catted y but no carb number, it just sucks that i am basically stuck. if i want to be carb legal then i have 2 choices 1:put my manifolds back on or, 2:waste money on shorty's.

im seriously thinking of saying screw it and buying a set of pacesetters and ory and having a set of cats installed in the ory, at least if its not gonna be smog legal it will be cheaper.

what kind of trouble can you get in if you get caught with a set of pacesetters and ory with cats welded into it, or any other non carb approved header/y combo for that matter?
 

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Discussion Starter · #6 ·
... i did get my hands on an 05 y pipe, and was thinking about ordering the thorleys, but the only thing that concerns me is if i get a smog guy who knows his crap, he will know that the 06's y pipes changed and if he runs the carb #on the headers he will find out they are smog legal for 99-01 only. and then i wont have the stock y to put back on. if the guys see the carb number and are cool with it, and they don't see anything wrong with the cats then i would be golden, but that's a whole lot of ifs...

and anyone know if you can be given a fine, or citation, or impounded, for a non carb legal exhaust system?
 

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Discussion Starter · #14 ·
ok time for an update

i shipped the headers back to bassani, and they looked at them today. come to find out somehow i got a bunk header, it doesnt fit their jig the #6 primary that was hitting my frame sticks out a good 3/4 inch further than it is supposed to. kurt from bassani said they have a raw steel header that is night and day from the one they sent me, and he offered to send it to me so i can test fit it. the thing is once i test fit it, if it fits i have to send it back to them so they can coat it and then wait another week to get it back, and if it doesnt fit then this is delayed just that much longer. since the 06 y pipe is different i questioned him how it was that any header other than a shorty would be smog legal since i am having to go to an 05 y pipe to make the bassani's work that is basically relocating the cats, and he told me that a stock y pipe is a stock y pipe, the stock cats will pass the inspection and the bassani headers are for sure legal to 06. kurt at bassani is a really cool guy and has worked with me through this whole thing and i asked him about the thorleys i was looking at as my only other option, i felt kinda bad for asking him about another brand but he was more than willing to help any way he could. i told him about them having a carb eo# right on them but their pdf file says they are smog legal from 99-01 only, he said that he has dealt with alot of smog shops and eo#'s and the carb# covers the truck drive train wise or until the body style changes and if you retain the stock cats with thorleys flanges like they are supposed to be used, and they have a carb # on them then they will pass. he still offered to refund me the money but was very insistent on me trying the one he had out in hopes that it would work for me. so what do i do now? do i try out the bassani header? or do i just say screw it and get my money back for a set of thorley's? the thorleys seem like they would make more torque down low seeing as they have longer primary's and are a tri y, both headers are 1 5/8's primarys. do the thorleys have that much of an advantage over the bassanis?

the bassani's


the thorley's
 

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Discussion Starter · #31 ·
well i called thorley and they said that the 310-y's were not smog legal for my truck, so to me that means when i go to have it smogged, there will be a problem. so i called bassani back and told him to ship me out the other header they have that was built with a little better q.c.. kurt was on it and said i will have it by tomorrow for a test fit, anyway i already spent the money and i wanted the bassani's from the getgo so im not too bummed out about getting the thorleys, im just hoping they the new header fits, and i can send them back for ceramic coating. he said that the header i got was laughable, when they tried to put it in the jig the collector was way out of whack and the primary tubes werent cut or bent right, they have no idea how it could have possibly even been welded up.

oh and about the trans cooler, yes the truck came with a factory trans cooler on it, but i upgraded to a trucool 40k:D

i didnt want to add any more rubber hose than the factory had so i picked up a length of pre-flared 3/8's tubing from autozone, cut it and bent a 90* bend for the drivers side and an offset bend for the passenger side, and cut the factory lines, i butted them up and used some stainless nut and ferule tubing couplers to connect them up. it came out pretty sweet.
 

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Discussion Starter · #37 ·
did you have to do any cutting? i saw another install thread by 1998chevy1500 on pt.net and i think he had to trim his bellhousing... but i think he had a 4l80
 

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Discussion Starter · #38 ·
ok i got the header from bassani and it is much different, it clears the frame with a 1/4 inch to spare, so its good to go. but now i have a new problem, the tranny cooler lines are in the way, i need to bend them in towards the starter to clear, but getting something in there to bend the lines is a pita cause there isnt much room. i was thinking of bolting the header up and wedging something in there to bend the lines out of the way but im pretty sure that will just kink them. any suggestions?
 

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Discussion Starter · #39 ·
time for an update
i got the header back from it getting coated and its installed, i got to fire up the truck for the first time in about 2 months, open headers ftw! anyway its going to the shop friday to get welded up finally. i think im gonna look for a little louder muffler now, i have a 24" long magnaflow that is really quiet, i love the chambered sound but not at the cost of flow, so i was thinking hooker maxflow single 3" center in/out and keep it dumped. any thought on the hooker maxflows? anyone have one?
 

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Discussion Starter · #41 ·
yeah post it up, the maxflow is pretty much the same as magnaflows do you remember what length it was? round or oval? did it drone much? you tube is good but crap mikes and dissimilar setups make it all sound different.
 

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Discussion Starter · #45 ·
dezert is that clip with your comp cam? it sounds great sleeper style!

Ok i just got the headers welded up and there is difference in sound for sure the headers are very quiet but you can hear the individual pulses. as for the butt dyno, i would say that the engine definitely breathes better, the difference is most noticeable at part throttle. the truck doesn't seem to need as much gas pedal to get going. wot is great with the headers the exhaust is a little louder, and it definitely pulls much better. all in all a worthy gain and a supporting mod for future mods like a cam...
 

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Discussion Starter · #48 ·
i was wanting to get a small cam, i was looking at the 206/212 and the 212/218 low lift, both of those have a slight chop to them, even though they are the smallest cams, i want more low/mid than 5k plus. but after seeing your before and after video i might just get the same one you got. im curious though how the lowend on that cam is, did it lose any?
and on your 0-95 after mods video (http://www.gmfullsize.com/forum/showthread.php?t=151586 i noticed that it seems kind of sluggish below 3500 rpms and then all the sudden comes to life, is that the cam or is that your footwork trying to keep traction?
 

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Discussion Starter · #50 ·
your graph didnt show up, try reposting or maybe pm it to me.
anyway this thread made me want to get the xr265 http://www.performancetrucks.net/forums/showthread.php?t=435536 but there is no improvement down low (below 3300 rpms) although it shows an impressive gain his max hp was 310 where in your other thread you said you were closer to 322hp and from your last post you made more torque over a wider band also. not to mention a damn near stock idle, which is also more of what i was wanting :D im not wanting to make this truck run 11's i just want it to be a little peppier and that 208/212 you got seems like the cam for me, i have a set of yellow ls6 springs should i use em, or dump em for some pac 1218's im pretty sure they will work, i have heard of guys using much higher lifts with them than the .554/.554 that that cam has.
 

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Discussion Starter · #52 ·
thats a good lookin graph too bad it doesnt start until about 3300 rpm, but choppy idle for sure.

i take that back you can get a tsp220 cut with a 116 lsa for a smooth idle, its in the drop down menu right on there website.
 
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