My original setup on my 305 tpi iroc was stock manifolds and y pipe going to a gutted cat and 3 inch cat back. and i loved the sound. I just recently put in a set of hooker shorty headers with the A.I.R tubes and brought it over to menikie to make a custom y pipe going from the 3 inch collector to the 3 inch cat. The guy said he had to use 2 1/4 pipe and i thought he did a pretty bad job putting it together. Now i feel like my car sounds alot quieter and runs worse then with the stock y and manifolds. Can this y pipe really be that horrible that it makes that much of a difference?

 

Welcome to TGO. Sounds as if there was no upgrade at all. OE sizes below. If M changed the work order without your permission, I'd complain.

2" outlet manifolds with single 2 1/4" y-pipe
82-87 305 LG4 (VIN H)
88-92 305 L03 (VIN E)
82-83 305 Crossfire
90-92 305 LB9 w/o G92 axle (VIN F)

2 1/4" outlet manifolds with single 3" y-pipe
83-86 305 L69 (VIN G)
85-89 305 LB9 (VIN F)
88 350 L98 (VIN 8)
89 350 L98 w/o G92 axle (VIN 8)

JamesC

 

Thanks for the welcome..oh yea should have mentioned it was an 88. Exactly, i thought they were going to put a 3 inch y pipe, but they said they couldn't do it biggest they can go was 2 1/4. I didn't know the stock was 3" inch tho ill have to go back and say something.

 

I would be willing to bet they did not make a custom Y pipe . Most likely grabbed a stock replacement off the wall and slapped it on.

 

if its running bad, the guy probably forgot to hooks something back up, O2, ect, or broke a spark plug, wires, something like that. I would look it over really well, then if you find a problem, bring it back and complain to M. even with the "fudged" y-pipe, it should run fine.

 

when i say worse i mean its slower and just not as peppy as it once was and quieter..it is running fine. im just surprised that they could make a crappier y pipe then the stock one and that that would be the reason my car is quieter and slower after the addition of headers.

 

it does sound like something is disconnected. If the 02s are disconnected broken, or anthing, the car will not perform correctly. Look it over.

any pics of this wonderful y-pipe?

 

the 02 looked okay from a glance ill have to go over it better when i get time.. if u dont mind can u explain how to add pics to a thread lol..sorry i never did it b4, i have to add them to a url or something right? thanks

 

click on the go advanced button then click on attach file , then click on browse , pick the photos you want to uplad then press upload , close the window , click post quick reply . max photos you can post per post is three.

 

you can see in pic of the pipe going to the cat he didnt take out the stock y pipe out of the cat he just cut it close and welded the 2 1/4 pipe.

Also when he was finished i checked it out and instead of welding the the pipes to the reducer he used the reducer as a sleeve, so in both reducers connected to the header there is about 1.5-2 inches of 2 1/4 pipe inside of them. I asked if he could hollow them out but he said that it wont make a difference.

I hope this all makes sense and the pictures work lol

 

Isn't the stock cat a 2 1/2?
Well anyways, my experience with headers this winter:
Hooker 2460 3" collectors, I provided the exhaust shop with a 2.5" collector reducer that theyd use when they make the ypipe.
I installed the headers at home and cut out my ypipe, now the stock ypipe is crap, and I dont know how anything can be worse than it.
So they fit a 2.5" ypipe in between the oil pan and cross member. That's the biggest size you can fit unless you want to go further down (closer to the pavement) which in turn youd lose ground clearance.
I had a magnaflow cat in my car, and i'm certain it was a 3" to 2 1/4". 3" for the catback part of my exhaust.
Just looking at your picture he has an enhance going from your ypipe to the cat.
So i'm thinking he just fabbed you up a 2" ypipe which in turn is probably worse than the stock ypipe.
So I would take it back and i'd get them to do a 2.5" ypipe into a new cat into a full 3" exhaust.
Because there is no way headers and a larger ypipe will give you less performance.
Just my 2 cents
And sorry for all the text.

 

Here's some pics of my ypipe.
And I just noticed, does yours even go in between the oil pan and cross member? Because if it doesn't then you are sacrificing a lot of ground clearance.
You can see in the last pic where my cat used to be.
I'm just really unsure that this shop did a top notch job on your ypipe. And hopefully they'll agree to fix it if your chose to take it back to them. I think my ypipe was done alright, definitely not amazing, but it'll do. You should try and do something about yours.

 

That right there really bugs me. Cause that is not a professional job, and I can see that as a big deal and performance robbing.
How much did you get charged?

Sorry for all the text, but this really does bother me, and I want to get to the bottom of this.

 

i dont know what im looking at here, but it looks awful

 

Thats exactly what i said but he told me its not gonna make a difference unless i had a "1000hp" motor lol. I paid 175.. my father is actually friends with the guy so im going back after the holiday to get this fixed up.. I really appreciate the help and ur set up looks real nice..the Y connection you have is what i thought the guy was going do for me instead of just dumping the pipe into another one. Also is your ypipe 3" from the cat back splitting into 2.5 or is it 2.5 the whole way?

 

Well since your dad knows him i'd definitely take it back, and maybe bring my pics in as well, and tell him you want it like that running in between the oil pan and cross member.
My setup goes headers w/ 3" collectors, to a header reducer (Hooker prt# 11040HKR), to a 2.5" YPipe, then it connects to a 3" exhaust.

 

i just purchased the hooker header reducers.. did u have to cut them at all? it seems on the passenger side header with the reducer on it will be pretty low then it has to go straight into a 90 degree angle into the y pipe

 

Ya the exhaust shop cuts them to size. You shouldn't have to do a thing. They should know how to do everything properly.
But yes, he cut it down to about an inch and a half.

 

I agree, looks like that's where the performance went out the window, a 2-1/4 into 2-1/4 merging???

They are full of **** when they say nothing larger than 2-1/4 would fit. I have 3" into 2-3/4 on mine (2-3/4 is a very uncommon size over there, here it's readily available in stainless)



The 90 deg elbows off the V band flange (modified headers for V bands) are 3" then it necks down to 2-3/4 .... fits like a glove

 

Hey Concept225... you can clearly see in the pictures they used a crush bent pipe as well. necking down the pipe diameter even lower than 2.25" they said they used.

your engine feels like crap because its bottle necking the exhaust... you wanted a giant "McDonalds straw and got a small coffee stirring straw" if that analogy works for you..


and if "they guy" says it doesnt make a difference unless its on a 1000hp car.. he clearly doesnt belong in this industry... but i think he was just trying to say something to you because he doesnt think you know any better and sent you on your way.

word to the wise... for performance modifcations to your car... never go to a national chain store... they wont do performance mods correctly..

 

Thanks for all the help guys. Im going back wednesday ill let u know how it goes.

 

Wow Twin Turbo that's a trick looking ypipe! So that's full stainless steel and 2 3/4"? I hear the Hooker 2055 ypipe is 3", but I think that it must be crush bent vs mandrel hey?
Mine is a 2.5" mandrel bent and i'm very very happy with it, fit and finish is great. Heath from Sherwood Park Exhaust in Edmonton did a great job. But he said 2.5" is the largest he could go, maybe he just didn't stock 2 3/4" piping? That's probably it.
And KillJoy is probably right about that crush bent, you must take your car back to this guy, and either explain to him and show him pictures of our cars so he can do a proper job, or get him to cut it out and refund you and take it to someone with experience fabbing ypipes.
Hope everything works out !

 

that y ends with 3" at the cat, its not 3" for the crossover pipe

 

Makes sense.

 

Concept225, that is officially the WORST Y pipe I've ever seen. I'll be real honest, take it to someone who actually cares and wants to do you a good job. The guy that did that should be ashamed of himself. He clearly takes no pride in his work. Sorry you got screwed like that...

 

Looks like crap, I would definitely take it back and demand a refund. however, maybe they did not disconnect your battery when they welded and royally fried something? I've seen this before, welding can do a number on your electrical system if proper steps are not taken before hand.

Will

 

That looks like bootleged Y pipe if you ask me.

Tony.

 

You should have researched a place before going to some run of the mill mechanic.. O well, should a could a would a, i guess.
Go to www.NYTHIRDGEN.com we have alot of Long island members there. And im good friends with the best exhaust guy on the island. PM me if you want his details. He will redo and fix youre problems.

 

So i finally had the chance to get this ypipe fixed and i fell in love with my car all over agian..I bought the 2.5" in to 3" out magniflow y and had a performance shop install it around where the cat used to be. Its amazing how much of difference this y made. it sounds beautiful and has much better performance. I dont have a pic of the setup yet but this is a pic of what i was talking about when i said the first shop left the pipe in the reducer from the header.

https://www.thirdgen.org/forums/pict...ictureid=14836

Thanks again everybody for all the help

 

LOL was that on your car like that? Whoever did that should be banned from working on anything but Jap cars

 

It just goes to show you what a poorly designed exhaust system can do to your car!!!!

I'm glad to see that you got everything straightened out.

It pisses me off when people take your hard earned $$$ and blow smoke up your *ss with sh*tty workmanship!!!

That's why I'm making my own Y-pipe this time!!!! Pictures to come!!!