Exhaust help - Chevy Impala SS Forum
 
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post #1 of 9 (permalink) Old 08-04-2016, 10:29 AM Thread Starter
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Exhaust help

Hey guys,

My car came with Borla Catback () which looks very nice buttttt flows and sounds like butt.

So I've now installed CIA long tubes, no cats, to the Borla and my god it's like driving stock exhaust again!!

Anyway, general consensus.... Found a dynomax ultra flow true dual kit (p/n 17375) for $570, or run the jegs dual kit with other mufflers than it comes with (suggestions?)... Or Frankenstein it with a pypes X-pipe, some sort of mufflers, and then dynomax over axle and some nice extension pipes to the rear bumper?

Don't want any drone, but I do like loud and deep! Better to run an X-pipe, or the true duals for performance?

Any votes?

'95 DCM - LT1PCMtuning Tune, TR55ix's, CIA Headers and Catless export pipes, Borla Catback, Moog Steering Rebuild, Vigilante 3.4k, ATi FlexPlate, Tru-Trac, 3.73's, B-Body Perf. Sway Bars, Monroe SS's, F-Body Front Brace, PMT Extended UCA/LCA Combo, '08 P71 CV Alum. DS, Accell Cermic Wires, MSD Coil, CAI, EGR/AIR delete, Home Plate delete, LED 9004s, Clear corners, Gunmetal SS Wheels, Smooth Bumpers, 20% Windows, Armrest Savers, JBL all around

'10 TDi - DD
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post #2 of 9 (permalink) Old 08-04-2016, 10:34 AM
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My $.02 is Frankenstein

Pypes X
muffler of choice (SpinTech Pro Street=loud, Sportsman=mild)
DynoMax over axle (2.5")
DynoMax resonators (resonators reduce drone)

\'96 BBB 383/T-56
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post #3 of 9 (permalink) Old 08-04-2016, 12:16 PM
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If you haven't already, check the Stickies for good info on the available Cat Back setups that are/were out there. I want in a system is 2.5" pipes, X-Pipe or H-Pipe, OTA tails, Resonator Delete, maybe some Chrome tips/pipes at exit and great sound. Stainless would be nice, but the Aluminized kit on the car now has held up well for lots of years so can't justify that expense. It was even on the car when I had the 4.3 engine which was easily 10+ years ago.

Recently picked up some Tri-Y's and will be replacing the current Flowmaster American Thunder kit that is on there now. I've been happy with it but like the Borla, it's a puny 2.25" design. While I can't speak from personal experience on other systems/mufflers, I can offer up some info on what others have said and the direction I'm now looking to go with the exhaust.

At one point was also strongly considering (Franken-exhaust) the Pypes kit along with a good set of mufflers. I believe the X Pipe section is Stainless but the OTA pipes are aluminized. One thing I don't like is that others have said the X portion hangs pretty low under the car. With a lowered car this could be a problem.

I have had my eye on something from CIA Exhaust for quite a while but the cost seemed high.

High Performance Exhaust Systems - Impala SS Cat-back Exhaust Systems

Their systems come with the Spin Tech Mufflers and you have a few options as well for both Mufflers and Tailpipes....even a 3" full version if you need it. All reviews I've seen on the Spintechs have been great. I have pretty much decided this is who my catback will come from when I'm ready to place the order and from what I've read, his kits fit really well. So if this is a little xtra money, it's almost worth it to me for that. Just my thoughts.....

EDIT - Just noticed you got the long-Tubes so his Cat-Back setup may not work. Maybe he offers something for his headers?

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


'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.

Last edited by 4DoorSS; 08-04-2016 at 12:26 PM.
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post #4 of 9 (permalink) Old 08-05-2016, 09:01 AM Thread Starter
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Unfortunately the header ordeal with CIA left quite an unsavory opinion of the business in my mind, and I cannot say I will be ordering anything from Dan or CIA again - which leads to the Franken-exhaust build.

How do these p/n's look to everyone?
Pypes XGi10
Spintech 3334 X 2
Walker/dynomax 21132 and 21133
Walker/dynomax 54016 and 54017

? I will be welding hangers onto the mufflers but everything else should bolt right up with 2.5" band clamps, correct?

'95 DCM - LT1PCMtuning Tune, TR55ix's, CIA Headers and Catless export pipes, Borla Catback, Moog Steering Rebuild, Vigilante 3.4k, ATi FlexPlate, Tru-Trac, 3.73's, B-Body Perf. Sway Bars, Monroe SS's, F-Body Front Brace, PMT Extended UCA/LCA Combo, '08 P71 CV Alum. DS, Accell Cermic Wires, MSD Coil, CAI, EGR/AIR delete, Home Plate delete, LED 9004s, Clear corners, Gunmetal SS Wheels, Smooth Bumpers, 20% Windows, Armrest Savers, JBL all around

'10 TDi - DD

Last edited by jcarl126; 08-05-2016 at 09:05 AM.
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post #5 of 9 (permalink) Old 08-05-2016, 10:31 AM
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Other than the CIA headers that is the same exhaust I have. IDK what Export pipe or CATS OP has but if that winds up where stock CAT pipe placement is than all should "bolt" up. Otherwise there will need to be some custom cutting/welding to mate the X pipe in

FWIW I had my whole system welded vs clamps at a muffler shop. The Pypes X pipe does flange bolt to the CAT pipes

I have also changed to 2 1/2" MagnaFlo CATS and pipe from my headers so I have a full 2 1/2" system

The Sportsman mufflers are not loud but do give a nice exhaust note, IMHO.

I like the turn down tips on the Dynomax resonators. Stainless and tuck up nice under the car
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\'96 BBB 383/T-56

Last edited by BALLSS; 08-05-2016 at 10:35 AM.
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post #6 of 9 (permalink) Old 08-05-2016, 10:53 AM
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Quote:
Originally Posted by jcarl126 View Post
Unfortunately the header ordeal with CIA left quite an unsavory opinion of the business in my mind, and I cannot say I will be ordering anything from Dan or CIA again - which leads to the Franken-exhaust build.
Care to share?


1995 Caprice ERE 383, CIA long tubes, Dynomax VT's, RAISS, Kore3/Z06 brakes, 3.42 posi, Boss 338 20's, 12 way seats, Impala SS console, etc etc etc
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post #7 of 9 (permalink) Old 08-05-2016, 11:07 AM
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Under the guise of damage control and recovery, and if I read your current config right, why not just swap in 2 1/2" collectors and front pipes and call it a day. I believe lots of the scavenging occurs up front anyway, and CW seems to point at 2 1/4" is more efficient than anything larger out the back - unless really super dooper horses.

You might get a pair of 2 1/2" in - 2 1/4" out if the 'notoriously too quiet Borla muffs' keep antagonizing you.

Sure it's a work-around, but also not $600 either.

Also,
Quote:
Originally Posted by jcarl126 View Post
Better to run an X-pipe, or the true duals for performance?

Any votes?
Never never don't run (triple negative) true dual - 'cept of course a quarter miler. Proven better offline torque with either an H- or (much more expensive but way prettier) X-.

\'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

Last edited by 96 Black; 08-05-2016 at 11:12 AM.
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post #8 of 9 (permalink) Old 08-05-2016, 11:17 AM
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Quote:
Originally Posted by atlantadan View Post
Care to share?
Well, if this is it, then my interest is in what clearancing a header entails. Port-matching? Grinding the flange welds flat?
Hypothetical HCI while waiting

\'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
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post #9 of 9 (permalink) Old 08-05-2016, 12:29 PM
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Quote:
Originally Posted by 96 Black View Post
Well, if this is it, then my interest is in what clearancing a header entails. Port-matching? Grinding the flange welds flat?
Hypothetical HCI while waiting
I'm running CIA Tri-Y's. There is nothing required to use them. They literally drop right in - zero fitment issues at all. They clear everything.

If the OP is referring to this thread, the problem has nothing to do with CIA.


1995 Caprice ERE 383, CIA long tubes, Dynomax VT's, RAISS, Kore3/Z06 brakes, 3.42 posi, Boss 338 20's, 12 way seats, Impala SS console, etc etc etc

Last edited by atlantadan; 08-05-2016 at 03:51 PM.
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