ZZP 2.5 inch Stainless Cobalt/Ion Downpipe


160 reviews

This variant is currently out of stock

Exhaust - ZZP 2.5 Inch Stainless Cobalt/Ion Downpipe
Exhaust - ZZP 2.5 Inch Stainless Cobalt/Ion Downpipe

This fits on all Cobalt/Ion/G5/HHR/Pursuit models with the 2.0L supercharged, 2.2, & 2.4L naturally aspirated cars. Will not fit '08+ turbocharged models.


    • Stainless flex

    • Stainless flanges

    • Stainless Spun metal cat 

    • Stainless piping

Our downpipes are made from stainless steel. No worries about rusting or paint flaking off. It costs a little more but we feel it's worth it. All welding is done to the strictest of standards and bears a professional finish. Weld quality is higher than any other downpipe manufacture. We promise our welds to be 100% leak free. Even the flanges are stainless, which isn't something most companies can say. When shopping around, ask if the downpipe is 100% stainless, ask for a close up picture of their weld. You'll know right away, what true quality is and what it isn't.

The stock pipe narrows down to a 2" hole before flowing into the cat. This is very restrictive causing KR and a loss of HP. Our 2.5" stainless bolt in downpipe remove all of the stock downpipe restrictions. No more 2" inlet, no more O2 bung dimple. By doing so gains of over 15HP can be had along with a substantial drop in KR. Most users can drop a pulley size after adding our downpipe. Plus our 2.5" bolt in mates to the stock or 2.5" cat back exhaust system without any welding.
Transmission: This determines if you need a downpipe for an automatic or manual transmission.

We are currently offering $75 in store credit to purchase your stock catalytic converter back from you. If you're interested, take a photo of your stock downpipe and email it to Henry@zzperformance.com. We will provide prepaid shipping labels for domestic (U.S.) shipments.

Exhaust - ZZP 2.5 Inch Stainless Cobalt/Ion Downpipe
Exhaust - ZZP 2.5 Inch Stainless Cobalt/Ion Downpipe
Customer Reviews
4.9 Based on 160 Reviews
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Nathan D.
United States United States
Fanciest looking down pipe I've ever seen

Haven't installed it yet but if it fits and performs half as good as it looks it will be fantastic. It's a shame it has to go under the car and cant be shown off more. Thank you very much you guys rock and i will be ordering from you again.

Jack S.
United States United States
Top Notch Downpipe

Now this downpipe is top notch! Everything is stainless including flanges! Bought for my 2010 Cobalt to mate to my PPZ stainless header. Car sounds better even though I'm still running stock catback exhaust. PPZ stainless catback exhaust is planned for this spring.

Lawrence Z.
United States United States
2.5" catted D/P on a '07 G5 GT

Although the downpipe bolts were a bit of a challenge to get off, this was the hardest part of swapping out the whole exhaust. The welds on the downpipe looked really good and the flex part of the pipe had both the corrugated pipe (inner), as well as some stainless woven mesh (outer). It seems really sturdy / well constructed.

Malachi H.
United States United States
Works great

It mounted easily to my full stock exhaust system and it sounds great

Jeffrey H.
United States United States

Item was available same day. Quick and easy install.