Where to order Downpipe for automatic?
New Member
Joined: 02-25-2010
Posts: 13
From: USA
Update to previous post. Well after all that, I got the wrong part from ZZP. Needed dp with two o2 bungs, only had one. had to order another pipe, finally got it and have it installed. The good news is, it sounds great, improved performance and gas mileage, but now cel is on!? Haven't had a chance to pull code yet. Any ideas, suggestions???
Last edited by jwl4261; Aug 26, 2011 at 10:35 PM. Reason: add comment
Thread Starter
Senior Member
Joined: 05-13-2008
Posts: 2,075
From: Knoxville, TN
Is your O2 bung, long....? as it needs a de-fouler. If not, you need to add one, or your gonna throw cells, as the O2 mix isn't quite right, at the pipe
. Weird, I thought our cars only needed one bung, the other one would be for data-logging, I assume.
. Weird, I thought our cars only needed one bung, the other one would be for data-logging, I assume.
Banned
Joined: 06-20-2008
Posts: 1,682
From: Chi-Towns burbs
After reading posts on here I ordered a downpipe from ZZP and I have to tell you I've been very disappointed in their "service" if you can call it that. First of all they do not answer their phones. They have that automated phone crap that all consumers love sooooo much. Then they don't return your phone call in a timely basis. Send an email to "customer service", might as well throw it in the trash can. I finally just ordered it online since I couldn't get a person to acknowledge me. I ordered it on a Monday, 3 day shipping option expecting to get it on Friday. I had gotten a "form" email saying my order status was in process on Monday so I responded to it Friday asking for an ETA and a few hours later I got another "form" email saying it had been shipped. Some 3 day service time. Their service, or more accurately lack of service SUX! I'll never order anything from ZZP again. If you feel you have to buy from them, give yourself plenty of time and don't expect any concern about customer satisfaction on their part. I'm now concerned about the quality of the part since they obviously give so little attention to detail. Buyer Beware!!!
Banned
Joined: 06-20-2008
Posts: 1,682
From: Chi-Towns burbs
Update to previous post. Well after all that, I got the wrong part from ZZP. Needed dp with two o2 bungs, only had one. had to order another pipe, finally got it and have it installed. The good news is, it sounds great, improved performance and gas mileage, but now cel is on!? Haven't had a chance to pull code yet. Any ideas, suggestions???
Senior Member
Joined: 05-18-2010
Posts: 313
From: Roseville, Mi
Update to previous post. Well after all that, I got the wrong part from ZZP. Needed dp with two o2 bungs, only had one. had to order another pipe, finally got it and have it installed. The good news is, it sounds great, improved performance and gas mileage, but now cel is on!? Haven't had a chance to pull code yet. Any ideas, suggestions???
Dave
New Member
Joined: 02-25-2010
Posts: 13
From: USA
Update, unlike bartSS, my experience with zzp was terrible, so I guess it's hit or miss at best. I added a anti-fouler to the rear o2 sensor and I only get a cel light occsionally now and it goes out pretty soon. Otherwise runs better, sounds better and gets better mileage. I just bought a 2011 hhr and will probably modify the exhaust on it when the warranty expires, but I'll shop for a free flow cat/downpipe elsewhere.
Senior Member
Joined: 04-18-2011
Posts: 384
From: Ocala, FL
I picked up a Catless DP from Hahn fron the black friday sale. Very easy transaction and the DP bolted right up and still hasn't thrown a code for no cats. It sounds awesome too and it gave me more torque
Senior Member
Joined: 12-14-2007
Posts: 2,964
From: Toronto ON Canada
The engine on an auto is angled forward more, so the top is a little farther from the firewall. Some have reported using the shorter manual downpipe without problems, as the exhaust is on rubber hangers and 1/2" isnt that much.
Thread Starter
Senior Member
Joined: 05-13-2008
Posts: 2,075
From: Knoxville, TN
I've had the Cat-less on since Aug. threw a few codes about a month in, they figured out I didn't tighten the O2 enough. none since. Love it real tourque'ie sounds nice coupled with their exhaust too, but pricey pricey pricey.
Member
Joined: 06-14-2009
Posts: 53
From: Granbury, TX.
Modern Performance Downpipe
Bought a catless Modern Performance downpipe. Excellent workmanship, came with a short 90degree piece to screw into the O2 bung. My HHR SS is an automatic and the pipe was a little short, so just tugged it forward until I got the flange bolts started, and then pulled the flange pieces together by tightening the flange bolts in an alternating pattern. The rubber exhaust hangers got stretched a little, but the pipe has been on now for about 10k miles with no failures. Also no codes with the Trifecta Infinitune and the O2 sensor installed into the 90degree bung extension. Modern Performance service/shipping was super fast.
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