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5/28/12 12:21am - Original Message: '1977 Side Exhaust'
Navyaq
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Champaign, IL - USA

Vette(s):
1977 USA VETT... I am a Navy Vet and bought this car from a guy that's in the Army. He started the USA theme on this previously yellow yard decoration that he found. Now it is my turn to add to this tribute to Country and those that defend her.

Joined: 9/25/2010
Posts: 13
I want side pipes!!! When I look for side exhaust, I always find that side exhaust for 1977 is for "off road use only".  What is that all about?  Can I put side pipes on my 77 or not?  If yes... can you send info on where to get these?
Thanks in advance,
David


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5/28/12 6:55am - Reply: 'Re: 1977 Side Exhaust'
flemgunner
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Scott, LA - USA

Vette(s):
77 L82 coupe

Joined: 2/26/2004
Posts: 303
Im pretty sure the "off road use" thing is basically stating you cant use em if you have any emissions testing. That having been said I just installed some hooker header and side pipes on my 77. They rock!


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5/28/12 6:59am - Reply: 'Re: 1977 Side Exhaust'
flemgunner
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Scott, LA - USA

Vette(s):
77 L82 coupe

Joined: 2/26/2004
Posts: 303
Im pretty sure the "off road use" thing is basically stating you cant use em if you have any emissions testing. That having been said I just installed some hooker header and side pipes on my 77. They rock!


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5/28/12 8:04am - Reply: 'Re: 1977 Side Exhaust'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
If it's for performance use on a limited usage car that doesn't need a catalytic converter to pass inspection, you should be fine.

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5/28/12 10:21am - Reply: 'Re: 1977 Side Exhaust'
corvette440hp Lifetime Member
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Joined: 7/2/2006
Posts: 8205
http://www.summitracing.com/search/Brand/Hooker-Headers/Make/CHEVROLET/Year/1977/Engine-Size/5-7L-350/Model/CORVETTE/?Ns=Rank%7cAsc

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5/28/12 10:36am - Reply: 'Re: 1977 Side Exhaust'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
In my area of Western NY we are subjected to a visual inspection, no sniffer test. That left me with a dilemma to solve. I've always want "N11" '69 side pipes on the '81. Problem was if there was a catalytic converter installed, there better be one installed. Yes there are repair shops around that will look the other way and slap a inspection sticker on. But I don't want to put anyone in jeopardy of losing their inspection license and being fined on top of that.

Sooooo......I went do to the local muffler shop and searched through their assortment of "OBD I" compliant catalytic converters. After selecting a set of cats I commenced to cutting, grinding, tack welding. After many hours I fitting them into the head pipes with plenty of clearance between the frame and the ground. Everything came out even and symmetrical.

I was going to finish smoothing out the welds and have them ceramic coated but I'm going to wait until after I do the "Baby LS1" install next year. I know I will be cutting and refitting the head pipes again. I also want to fit a crossover or "balance" pipe between the head pipes to hopefully enhance the sound a bit.

If you click on my cardomain link below there should be some pics of my cat install.



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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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5/28/12 7:36pm - Reply: 'Re: 1977 Side Exhaust'
ebo Lifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4395

Purrrfection.....as usual! can't wait to see it!

Evil Smileebo



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5/28/12 9:17pm - Reply: 'Re: 1977 Side Exhaust'
tinbender
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edgwood, MD - USA

Vette(s):
1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.

Joined: 11/1/2007
Posts: 736
I had them on my 75,however they don't weather well if you don't have a garage.I just had mine taken off this past weekend.That said the do look coolCool on a C3.
                          Rick

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5/28/12 10:21pm - Reply: 'Re: 1977 Side Exhaust'
Navyaq
Former Member
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Champaign, IL - USA

Vette(s):
1977 USA VETT... I am a Navy Vet and bought this car from a guy that's in the Army. He started the USA theme on this previously yellow yard decoration that he found. Now it is my turn to add to this tribute to Country and those that defend her.

Joined: 9/25/2010
Posts: 13

I appreciate all the comments!

I suspected the emission thing... no big deal here in the midwest! Hope to get some soon... Time to go shopping :-)


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5/28/12 10:41pm - Reply: 'Re: 1977 Side Exhaust'
Navyaq
Former Member
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Champaign, IL - USA

Vette(s):
1977 USA VETT... I am a Navy Vet and bought this car from a guy that's in the Army. He started the USA theme on this previously yellow yard decoration that he found. Now it is my turn to add to this tribute to Country and those that defend her.

Joined: 9/25/2010
Posts: 13
Thanks for the link!

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5/29/12 12:55am - Reply: 'Re: 1977 Side Exhaust'
daveo76
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 831

Federal law takes precedence over any state laws when it comes to emissions and I believe that law is essentially that any original emissions equipment must remain intact.  That being said, in my part of Washington state, emissions inspections are not required for cars 25 years and older.  So it's fairly common around here to have older vehicles without proper emissions equipment (me included - no cats, no EGR) 

Sarge81 - FYI, I'm not so sure that a crossover or X-pipe will improve the sound.  I have a buddy with a '79 that has dual 2 1/2" Magnaflows and X pipes.  I have the same setup minus the X-pipe and I think my system sounds better (although it's been almost two years since I've heard it Smile.)  IMHO, the crossover almost makes the sound too mild and quiet.  My long range plan involves chambered exhaust to replace the Magnas - side pipe sound without side pipes!  I've also heard that dual cats without any mufflers at all produces a pretty good sound.  



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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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5/29/12 9:32am - Reply: 'Re: 1977 Side Exhaust'
CCasey
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New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp

Joined: 8/17/2010
Posts: 173
I live in an area in Ohio that does not conduct emmision testing.  There are several circumstances for permanent exemptions also.
 
Several types of vehicles are PERMANENTLY EXEMPT from the E-Check test requirement and do not need a visual inspection. A complete list with a detailed explanation may be found in Ohio Administrative Code, Section 3745-26-12(c). It is not necessary for vehicle owners that are permanently exempt to be issued an exemption certificate. The most common types are listed below.
  1. Vehicles more than 25 years old, as determined by vehicle model year;
  2. Commercial vehicles weighing more than 10,000 pounds gross vehicle weight rating;
  3. Historical and collector's vehicles - contact Ohio BMV for details;
  4. Parade and exhibition vehicles - contact Ohio BMV for details;
  5. Motorcycles, recreational vehicles and motor homes - contact Ohio BMV for details;

I have Collector Plates on my '80 and since it is more than 25 years old, I will never be checked.  That being said, I have no cat and have installed Patriot tight tuck headers and a MagnaFlow exhaust.  With the other engine mods I have made, the car has never run better.



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Chuck

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