Dwindling Selection of Cat-Backs - Chevy Impala SS Forum
 9Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 33 (permalink) Old 04-13-2016, 01:18 PM Thread Starter
Senior Member
 
Join Date: Jan 2001
Location: St. Louis
Posts: 6,257
 
Dwindling Selection of Cat-Backs

I'm hunting alternates to my current 2 1/2" Hooker Aero catback setup on the Cady. It's worked great, but after 14 years it's finally coming apart with repeat cases of rust-thru along the pipe seams.

I'm just fixated on trying something new, and my first thought was a nice DynaMax Ultra Flo system. Summit/Jegs shows no app. The company says BACKORDERED - No plan restart - for awhile it seems.

Next. For Flowmaster The good news: there appear to be some new model mufflers compared to the numbers I've heard over the years (i.e. 70 Series BigBlock):

https://www.youtube.com/watch?v=QEBdiW4LbI0

The bad news: I called the company. Not doing anything for B-body now.

FTR, I see listing still in Jegs for the Hooker Aero setup.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds and CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: SS Bars, METCO LCAs, Koni Reds, PowerTrax No-Slip
96 Black is offline  
Sponsored Links
Advertisement
 
post #2 of 33 (permalink) Old 04-13-2016, 04:15 PM
Senior Member
 
KW Baraka's Avatar
 
Join Date: Feb 2001
Location: South Central Texas....By Way of the South Side of Chicago!!!!!
Posts: 19,986
 
Quote:
Originally Posted by 96 Black View Post
.......I'm just fixated on trying something new, and my first thought was a nice DynaMax Ultra Flo system. Summit/Jegs shows no app......
DynaMax has to be bought piece-by-piece from Summit.....not sold as a kit.

KW

1996 BBB SS, 398ci Solid Roller LT4


1995 DCM SS, LS3 w/Custom CAI, V-max 90mm TB, TSP CNC Ported Heads, Lingenfelter GT1-1 cam, Headman Mid-length Headers, 2 1/2" cat-back, 3200 Circle-D TC, 3.42 gears (for now) -- 450 HP/400 TQ To The Wheels


2014 Chevy SS; 429ci LS3 -- 508HP, 455TQ @ the wheels....After Break-in Dyno & Track Results Pending

KW Baraka is offline  
post #3 of 33 (permalink) Old 04-13-2016, 05:26 PM
Senior Member
 
4DoorSS's Avatar
 
Join Date: Nov 2008
Location: Beautiful Chester County, PA
Posts: 7,039
 
I've had the Flowmaster American Thunder system in my Caprice for over 10 years. Had it with the old L99 and now with the LT1. This system does not use resonators and instead has chrome tail pipes.

The system fit well on the caprice, not sure how it may fit on a Caddy. The downside (to me) is 2.25" pipe and a H pipe instead of X pipe. The positive...this system just won't rot away. Waiting for it to happen so I can go with a Franken-system with 2.5", X pipe and finally be able to install my DM triangulation bars. This system just won't rot away and justify replacement which I guess is a plus, and was easy to install myself.

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.
4DoorSS is offline  
 
post #4 of 33 (permalink) Old 04-13-2016, 06:32 PM
Senior Member
 
strokedimpala's Avatar
 
Join Date: Sep 2004
Location: new york
Posts: 1,554
 
exhaust

U could try Dan at Clear.image.I am sure he could help u.
Paul.

1996 ss 396 lt-4 competition longblock golen engines.custom hood,bumpers,spoiler,20\"billet specialties wheels.3.73.speedtech performance upper and rustic lower control arms.power performance motorsports frontend.body bushings,frame and floorpan painted.tce 14\" 6-piston front kit wit 4-piston 13\"kit in rear.
stainless quad-1 headers w/3" stainless exhaust.
fully painted undercarriage,w stainless bolts everywhere.
strokedimpala is offline  
post #5 of 33 (permalink) Old 05-16-2016, 07:09 PM
Junior Member
 
Join Date: May 2016
Posts: 5
 
I have a set of "Pipes" 2.5 inch brand new in the box if that interests u. Was goin to run them with a pair of dynomax mufflers, also new in box. But im goin to have to run a 3inch exhaust system with my new setup.
87 Saleen is offline  
post #6 of 33 (permalink) Old 05-18-2016, 09:31 AM Thread Starter
Senior Member
 
Join Date: Jan 2001
Location: St. Louis
Posts: 6,257
 
87 Saleen thanks kindly for the offer.

Quote:
Originally Posted by 4DoorSS View Post
....go with a Franken-system ....
Limping along using band clamps and copper rtv at various burnthrus. I calculate replacement with expiring tags in 2 years using your approach. Considering no intermal mods most probably doing a 2 1/2" in X 2 1/4" out muffs approach this time. You know oem Cady is ~19" long muffs, probably the most quiet and restrictive things ever designed . My Aeros sound darned good, but I'd like more than 14" muffs considering all that room. I'll be checking more into those long new model Flowmaster jobbies for SUV/pickups.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds and CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: SS Bars, METCO LCAs, Koni Reds, PowerTrax No-Slip
96 Black is offline  
post #7 of 33 (permalink) Old 05-18-2016, 07:13 PM
Junior Member
 
Join Date: May 2016
Posts: 5
 
No prob!
87 Saleen is offline  
post #8 of 33 (permalink) Old 05-18-2016, 08:05 PM
Senior Member
 
Brick B-Body's Avatar
 
Join Date: Feb 2001
Location: San Jose, California, United States of America
Posts: 581
 
Quote:
Originally Posted by strokedimpala View Post
U could try Dan at Clear.image.I am sure he could help u.
Paul.
I'll second Dan at Clear Image. He makes smooth, no crimp pipes specifically for the B-Body chassis. He worked with me on my wagon exhaust. The pipes aft of the axle are totally different from the sedan. Dan set me up with loose components (pipes over the axle & around the gas tank, resonators and turn downs), that my local shop was able to tweak and fit to my wagon.

Just a guess, but the extra wheelbase of the D-Body could be incorporated between the siamesed X-Junction and the mufflers.

Spintech makes long case mufflers in the Sportsman Street 3000, Sportsman Street 3000XLP line (both w/13" case) and Truck/RV 8000 (20" case).

Joel R. Rojas
4th Gen B-Body Sedan, 5th Gen B-Body Sedan & Wagon owner
'84 Caprice Classic Sedan F41 ==> Drydocked for R&D
'95 Caprice Classic Wagon F40 ==> Somewhat Stock
'95 Caprice Classic Sedan WX3 ==> Has 3 pedals
Region of DOOM
ISSCA # 517

"Oh, the equipment's guaranteed, but I have my doubts about the stuff inside.", Lt. Cmdr Montgomery Scott
Brick B-Body is online now  
post #9 of 33 (permalink) Old 05-18-2016, 10:45 PM
Senior Member
 
schlicky13's Avatar
 
Join Date: Mar 2016
Location: Iowa
Posts: 168
 
Garage
The dynomax stuff is what I'm planning on running. Here's the parts diagram from their website:



My only issue, which I think OP or someone else mentioned, is that I kind of want to stick with original (or close to) length mufflers, and I've always been partial to Dynomax super turbo mufflers. I've used them on a few other cars over the years, and I always like the sound, but usually the "recommended" case length is too short for my taste.

Also, these mufflers would be far cheaper (about half) than the ultra flows listed in their kit. There also may be enough extra length to make up for the difference between B and D bodies. I'll just have to see if I can find a muffler shop around here that can weld on some sort of doo-hicky that would allow the super turbos to be attached to the factory hangers.

These should be the right ones (I'd have to double check my notes), 2.5" in and out, in the correct locations (obviously one muffler would be flipped upside down) and a full 25+" case length.

Dynomax 17749 Aluminized Super Turbo Muffler Oval 4 25 in x 9 75 In | eBay



But I should note that in my build, while performance is a definite must, I'm also striving for stealth so these should flow just as well as anything else you can find, but will likely be a lot quieter, especially at idle and low rpm/load. But when you get on 'em, it should be obvious that your ride isn't anything but stock.

Something witty.
schlicky13 is offline  
post #10 of 33 (permalink) Old 05-19-2016, 09:24 AM
Senior Member
 
91ss's Avatar
 
Join Date: Dec 2008
Location: NYC
Posts: 1,277
 
The 17749 is that I run on the 91. It's not a 25" case but rather 25 overall. Case is 20.
91ss is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome