Magnaflow DP, yay or nay? lol
Joined: Apr 2010
Posts: 12,605
From: Mentor, Ohio
If you want a performance down pipe with U-bend delete, you should go with the ZZP 2.5" pipe. The stock pipe is double lined steel with only about 2" inside diameter, but the ZZP one is true 2.5".
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
Those are the prices that ZZP shows on their site for the u bend delete pipes they sell, and require welding into your existing system. I replaced my resonator with a Magnaflow glass pack instead of deleting it. From what I've read you get drone if you remove it completely - something I didn't want. You'd never know I have a glass pack on my car since it is followed up by the stock mufflers. It's only a touch louder than stock at idle, and has a nice mellow note to it at cruising speeds. The dp is only 4 bolts so it's not difficult to replace. I would suggest spraying the bolts with penetrating oil for a couple of days prior to replacing though. If not you may wind up breaking a stud. Mine broke loose with little effort. Since the glass pack didn't have a flange I picked one up (Dynomax 41806) so it would bolt up to the dp. The only welding that was required was the flange to the glass pack and the glass pack to the existing intermediate pipe. Don't forget the anti-seize on the O2 sensor when you reinstall it. 
I'm going to try it out without a resonator first
and see how that goes. As far as the downpipe, I should be able to change it out myself, just really hope I don't break any of the bolts :p If you want a performance down pipe with U-bend delete, you should go with the ZZP 2.5" pipe. The stock pipe is double lined steel with only about 2" inside diameter, but the ZZP one is true 2.5".
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
yes mogwog thats what I meant sorry I didnt explain that and I kind of figured that but I was thinking of going to true duals but the way its swt up now is probably cheaper and to me looks just fine, sorry I didnt explain very well 
Monte Of The Month -- August 2012
Joined: Apr 2011
Posts: 6,074
From: Seattle
If you want a performance down pipe with U-bend delete, you should go with the ZZP 2.5" pipe. The stock pipe is double lined steel with only about 2" inside diameter, but the ZZP one is true 2.5".
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
When I put my ZZP downpipe on, I actually inspected for myself and ZZP is right about the diameters.
The Magnaflow is stock diameter at the flange where it bolts to the manifold, but then tapers out to a larger diameter for the remaining length. Sitting side by side the Magnaflow appeared to have a slightly larger OD, but that may have been an optical illusion due to its new shiny surface. It is also single wall so the ID is larger diameter than the stock pipe.
Congrats - That's a good price. The best I found was $185 until I stumbled across someone selling one on eBay. I don't think you'll have any problems replacing it yourself. The only potential trouble spot is snapping off a stud on the manifold. Just soak the studs with penetrating oil for a couple days before trying to break the nuts loose. If they still won't break loose apply some heat to them with a portable torch.
Congrats - That's a good price. The best I found was $185 until I stumbled across someone selling one on eBay. I don't think you'll have any problems replacing it yourself. The only potential trouble spot is snapping off a stud on the manifold. Just soak the studs with penetrating oil for a couple days before trying to break the nuts loose. If they still won't break loose apply some heat to them with a portable torch.
Yesterday I got bored and got under the monte and broke the nuts lose, sprayed em with penetrating oil and tightened them back up
They came off pretty easy
Can't wait till my DP gets here
On the o2 sensor, did u just remove it with a wrench?
I used to have an o2 sensor socket but lost the darn thing lol
Monte Of The Month -- August 2012
Joined: Apr 2011
Posts: 6,074
From: Seattle
I took mine to a friend's shop so I could use the hoist and have him do the welding. We used an O2 sensor socket and a curved handle 3/8" drive breaker bar...came out without a problem.
i'll be doing it at home using a jack and some stands
while im at it im guna start the car up with the cat back off and see what it would sound like if it were straight piped
for the resonator delete i'll be taking it to a shop, it shouldn't be much to weld a piece of pipe there and my tips
