Downpipe L67

Need a 3' downpipe and Catalytic Converter .Hogans performance has one for a Bonneville thats 280.0..ZZP has a Bonneville downpipe it is as follows ZZP downpipe for Bonneville
VIN :
Size:3" full length weld in
Model:304 Stainless steel
Option 1:Magnaflow cat
Its around 220.00.Is there a quality difference?Would like to order from ZZP ,online ordering is easier, but I want to make sure it's everything I need .

Anyone with an oppinion on this?My Powerlog and crossover arriving today .Installing this weekend.Id like to order my downpipe and cat early next week.Just not sure which to go with.

I thought ZZP's DP for the Bonne's was also a Hogan part? I know other 3800 vendors list Hogan's DP for sale.

Oh, maybe not. Hogan's is 409 stainless, not 304. 304 would be a better choice, durability-wise.

ZZP Downpipe:

https://rivperformance.editboard.com/series-ii-engine-transmission-f4/zzp-downpipes-t2579.htm

Hogan Downpipe:

https://rivperformance.editboard.com/series-ii-engine-transmission-f4/hogan-downpipe-t1142.htm

ZZP looks like a good deal. 3" 304SS DP with Magnaflow cat, for $220. Bolts to the rear manifold, you need to cut off the old unit behind the oem cat, then weld new one to the resonator, or clamp it. Mine is clamped. Might want to confirm they have the O2 bung on the cat. Mine came with the bung from Hogan.

Just spoke with Curt at Hogan.I just have to get him some measurements and he can build the dp and cat to my needs.Price is a little cheaper as a combo.He says there are 4 or 5 different measurement combonations he has seen with our set up.I called ZZP also, didn't get the same level of expertise from them.They said alot of "hmmm not sure we haven't tried that yet."So I think I'll go with Hogans.

I have Hogan's Bonne 3" DP and Magnaflow cat, purchased from them separately. The fit is perfect, but you or a shop needs to cut off right behind the old cat in order to weld or clamp in the new. Are you wanting them to make you a one-piece combo? I'd stick with the DP and Cat as separate, bolt-together parts.

1998 Riv wrote:

I have Hogan's Bonne 3" DP and Magnaflow cat, purchased from them separately. The fit is perfect, but you or a shop needs to cut off right behind the old cat in order to weld or clamp in the new. Are you wanting them to make you a one-piece combo? I'd stick with the DP and Cat as separate, bolt-together parts.

Did you put yours together yourself?Did it need any major modding? Thanks for your help Dave.

I intended to, but my stock DP -to- Cat mounting bolts and nuts were so badly corroded I couldn't get a single one off. And I had planned to have the new cat welded to the stock resonator anyway, so I had a good local exhaust shop do the install. Ended up clamping it though. Really no modifications other than cutting the old cat out at the right distance in back, in order to weld or clamp in the new one. I also rarely have a lot of free time to spend on this stuff, so the shop install was a hell of a lot faster than it would have taken me. I think a lift would be a big plus...

I had a Hogan that was their Bonne prototype built for another guy. The quality etc was fantastic. Add that the customer service and I think Hogan is the way to go.

Ditto on Hogan's quality, and customer service.

I talked to Curt, and I agree with everyone...

This guy is just great. And I love my downpipe, it's rock solid!

Ordered Hogans downpipe and cat.Will be here next week!

imo you should have just saved on got headers.

The Hogan is a good product. So is P-log. They should make a decent improvement.

Not everyone needs to install headers. You really have to do some other stuff to make them worthwhile. Not everyone wants the added noise, either. Plus, headers are not street legal in most states.

AA wrote:

....................
Not everyone needs to install headers. You really have to do some other stuff to make them worthwhile. Not everyone wants the added noise, either. Plus, headers are not street legal in most states.

All very true.

1998 Riv wrote:

AA wrote:

....................
Not everyone needs to install headers. You really have to do some other stuff to make them worthwhile. Not everyone wants the added noise, either. Plus, headers are not street legal in most states.

All very true.

I tried to weigh all options, pros and cons.I was able to do all my own work , no bending ,cutting,swearing. Out of the box and on my car in an hour.One minor problem, that was my own fault though.

I've decided against the headers because I'll never do a CAM.

I was thinking about rockers, but to be honest, I just want to make sure my car stays in tip-top shape with a little extra power in it, which it does have right now, but that stock front manifold is just too small.

I've got PLENTY of 60k mile stuff I need to do before I can think about mods past the P-log... and after that's all said and done, I know this car isn't going to be super fast, and I've accepted it.

Are headers recommended with rockers? Because aren't you flowing more air or something?

Anyway, p-log is easier to install as well. Even more money/time saved.

[quote="

[quote="Are headers recommended with rockers? Because aren't you flowing more air or something?
Thats a good question.I would like to do rockers this winter.Maybe AA will chime in on this one.Do headers need to be installed for rockers to be fully effective . Does a Plog ,rear Pem 3''downpipe with high flow cat open it up enough?

AA wrote:

Not everyone needs to install headers. You really have to do some other stuff to make them worthwhile. Not everyone wants the added noise, either. Plus, headers are not street legal in most states.

very true, i misjudged, just looking at how he is doing his mods, i figured he wanted the best bang for the buck

There's no definite right or wrong answer to this. It has to do with how much you want to spend, how much NVH you can tolerate, and if you are willing to "technically" break the law. Also, there's something about headers that just says you're serious about engines and modding.

I think headers are always going to flow better than ported manis or P-log + downpipe, but unless you have other mods to push air into and through the engine, I don't think the advantage is that much. You put headers on a stock car, I think the gain is only slightly better than a P-log + downpipe. You put headers on a cammed engine with IC and 2.8" SC pulley, you'll rreally feel it. Having rockers + 3.3" puts me somewhere in the middle.

Part of me wanted headers because I used to think I would mod a lot further than I did. The other part wanted them just because I think they are cool! I wanted a little less luxury and a little more hotrod in my daily ride.

AA wrote:

There's no definite right or wrong answer to this. It has to do with how much you want to spend, how much NVH you can tolerate, and if you are willing to "technically" break the law. Also, there's something about headers that just says you're serious about engines and modding.

I think headers are always going to flow better than ported manis or P-log + downpipe, but unless you have other mods to push air into and through the engine, I don't think the advantage is that much. You put headers on a stock car, I think the gain is only slightly better than a P-log + downpipe. You put headers on a cammed engine with IC and 2.8" SC pulley, you'll rreally feel it. Having rockers + 3.3" puts me somewhere in the middle.

Part of me wanted headers because I used to think I would mod a lot further than I did. The other part wanted them just because I think they are cool! I wanted a little less luxury and a little more hotrod in my daily ride.

Do you think that with a 3.4 pulley , downpipe , Plog ,rear Pem ,and a high flow cat I would feel the benefit of 1.91 rockers?also what are the chances I could run a 3.3 pulley? I know that scanning is the key, just looking for your opinion.

hey I have a question witch downpipe do u guys recomed for my 96 sc riv?

I believe what you're looking for a is a 3" Shorty from ZZPerformance. The pipe they sent for the GTP was supposedly a shorty but it replaced the cat. I thought the shorty was supposed to be the one that allows you to leave the cat, so if you wanted to keep it I'm not sure which is the right one to go with (I would like to know this as well as a 3" DP is somewhere in my future mods and I want to leave my cat).

I used the 3" shorty , had to argue with them a bunch to get them to do it , but they reused the factory flange and cat.