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#1060134 - 12/02/18 02:53 PM Exhaust Recommendations  
Joined: Nov 2018
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Nate1976 Offline
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Nate1976  Offline
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Twin Lake MI
I am purchasing a 1984 Monte Carlo SS in 2 weeks and it will need exhaust and headers. What exhaust package is good and fits? I will take recommendations on mufflers as well. Thanks

#1060145 - 12/03/18 03:51 PM Re: Exhaust Recommendations [Re: Nate1976]  
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upflying Offline
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upflying  Offline
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Reno, NV
Hi Nate, it sounds like a car that "needs" headers and exhaust probably needs other stuff too. What are your performance, appearance and sound priorities? What condition is the rest of the car? Why does it need exhaust, is it rotted out? Will you need AIR fittings on the headers, will you need an O2 bung on the headers, will you need cats?

Last edited by upflying; 12/03/18 03:57 PM.

86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

[Linked Image]
#1060146 - 12/03/18 07:18 PM Re: Exhaust Recommendations [Re: upflying]  
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Nate1976 Offline
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Nate1976  Offline
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Twin Lake MI
The exhaust that is on it doesnt look too bad. I wanted to see what packages where available for my year that would fit well. And getting headers. I am going to purchase a cowl induction hood for it and paint the car blue in the spring. I am going to keep the 305 because it only has 78,000 original miles on it. I plan to put a cam, intake, and heads on it. A guy I know works on race cars and is a mechanic. Those mods would put me about 350 hp. It will be a summer daily driver.

#1060147 - 12/03/18 08:26 PM Re: Exhaust Recommendations [Re: Nate1976]  
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upflying Offline
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Reno, NV
Ok, it sounds like you are removing the CCC, so you will be doing a distributer change too. There aren't that many headers made for SBC G-bodies and I think the emissions legal TES headers are no longer made. Someone will eventually have a header suggestion and recommendation. I would have an exhaust shop bend up a custom system to your liking once the mods are done, that's what I did after my LS swap. You will need to buy a double hump transmission cross-member to make the headers fit.
Just keep in mind the small bore, poor breathing 305 is not the best performance platform when adding heads, intake, cam, carb and headers. Those power adders work better with the 350.
See more in this thread.
http://www.montecarloss.com/community/ubbthreads.php?ubb=showflat&Number=245007#Post245007

Last edited by upflying; 12/03/18 08:27 PM.

86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

[Linked Image]
#1060148 - 12/04/18 01:02 AM Re: Exhaust Recommendations [Re: Nate1976]  
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tomh115 Offline
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Russellville, AR
Hooker makes a cat back system that changes the exit location from behind the bumper to side exit behind the rear wheel (grand national style). I've got it on my SS. Heard a lot of horror stories about Pypes systems so I'd avoid them (search them on the forum to read about the issues). If you are removing the CCC system you probably don't have to worry about finding the headers for the AIR pump system like the hooker and edlebrock TES obsolete parts so any good header would work just size the primaries right. True dual or like the stock single cat system? The hooker system is a bolt on for those of us still running the single cat in stock location system.

Lots of questions but welcome to the best forum.


[Linked Image]
1987 Monte Carlo SS Aerocoupe
Objects in mirror are losing
https://www.flickr.com/gp/34317731@N08/3xk4xk
#1060150 - 12/04/18 03:44 PM Re: Exhaust Recommendations [Re: Nate1976]  
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Buick Runner Offline
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Buick Runner  Offline
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Dharma station 1 the Hydra
Most of the direct fit performance parts for these cars were discontinued 10 years ago. However, you can weld O2 sensor bungs, AIR pump manifolds, and Thermac heaters onto any headers. There is a forum member named bitflipper who sells a performance chip for CCC systems, but if requires using a 87 or 88 computer. The valve shrouding issue with 305s doesn't start until 6,500 rpm, which is very high rpms for a street motor. It would be a problem for race track motors or with d*** measuring contests.

350 hp is wishful thinking, 300 hp is about the practical limit for a 305. That is with using 059, 58cc vortec heads.

Last edited by Buick Runner; 12/04/18 03:50 PM.

SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1060151 - 12/04/18 06:29 PM Re: Exhaust Recommendations [Re: Nate1976]  
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Witness86SS Offline
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Hatfield, PA
I use a set of hooker long tubes right into 2.5 inch straight pipe from summit, then electric cutouts, then flowmaster 40's( i think), with flowmaster g-body 2.5 inch tailpipes

Keep the carb, computer and O2 sensor. It's easy to weld a sensor bung into a header collector and use a heated O2.
I also recommend one of Bitflipper's chips and an 87 ECU.

You can ditch most things while retaining the computer and get a fairly empty engine bay that isn't a rat's nest of wires

[Linked Image]


Justin
1986 Black SS
Upgrades: 350 L05 - Hooker Longtubes - FlowMaster True Dual 2.5" - Electric Cutouts - Electric Fans - Transcooler - Proforged Steering Kit - Astro Shaft - AR62 OUTLAW II Wheels - Energy Suspension Bushings - Bitflipper Chip - 87 ECM - Moog Springs and Ball Joints - Bilstein Shocks - Bucket Seats
#1060152 - 12/05/18 12:52 AM Re: Exhaust Recommendations [Re: Nate1976]  
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tomh115 Offline
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Russellville, AR
http://montecarloss.com/technical/

Don't know if you have found the link above but it looks like you should be able to get the power you want at the flywheel if you follow a build guide.


[Linked Image]
1987 Monte Carlo SS Aerocoupe
Objects in mirror are losing
https://www.flickr.com/gp/34317731@N08/3xk4xk
#1060153 - 12/05/18 02:42 AM Re: Exhaust Recommendations [Re: Nate1976]  
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86ttop Offline
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86ttop  Offline
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Brooksville, Fl
Headers really wake up the L69 engine!!


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#1060164 - 12/07/18 09:08 PM Re: Exhaust Recommendations [Re: Nate1976]  
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Nate1976 Offline
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Nate1976  Offline
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Twin Lake MI
Thanks for all the recommendations. I am going to do some more research and read the articles from the links on this thread. Thanks for the info gentelmen.


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