C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Sep 23, 2009 | 08:41 AM
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Default Sidepipes

I have yet to find the fiberglass covers that used to be available, but what do you guys think about them? If I can't locate a pair I may have to look into having something similar fabricated.



Appearance-wise, I like them, but I also like the stock look of my car.

Project-wise, I would need to have the exaust system fabricated from the end of long tube headers to the sides... not sure what complications would be encountered there.

Performance-wise... is there really any advantage? Maybe slightly less weight?

Original site for the part:
http://www.powereffects.com/indexmain.html

Last edited by 89 Vett; Oct 4, 2009 at 01:40 PM.
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Old Sep 23, 2009 | 10:48 AM
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I dont think it would be too complicated to fabricate.
My only concern would be ground clearance of having to route a roughtly 3 inch tube under one of the lower parts of the body, plus allowing for space for heat and flex..

I remember when i was building mine i was concerned with ground clearance .. and that was with having a tunnel to route the tubes through.
my car is lowered a bit too

something to consider
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Old Sep 23, 2009 | 11:07 AM
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The search engine is your friend

Originally Posted by 91GreatWhiteShark
I custom made my own side pipes for my 91. I still have all three stock cats and it required some mandrel bends from the "Y" connector. As you mentioned, the "Side Effects" kit is no longer available. I bought some aftermarket C2 side pipe covers and modified them to fit the C4. Aside from the custom work, I did notice nice gains with the exhaust. I eliminated the mufflers, so the only thing that makes the exhaust somewhat quiet are the cats. It has a nice deep rumble and drone from the interior. Sorry I don't have any pics of the actual exhaust, but you get the idea.





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Old Sep 23, 2009 | 11:47 AM
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Looks wise I prefer the stock look. I know the piping for that system was very restrictive. With a custom setup that wouldnt matter though. I would also be concerned about the exhaust fumes when the door or windows are open. I'm thinking of all the times I've had to work on the engine with it running. I occasionaly jump in the seat to check the gauges, data-log, or rev the engine. Then again my exhaust is completely open so it may not be so bad on others. Lately I've been considering dumping it underneath or putting some mufflers back on with cutouts.
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Old Sep 23, 2009 | 01:51 PM
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you can get them from MAMO
not the pipes but, fiberglass pieces like that
they are a couple hundred bucks, can be painted
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Old Oct 1, 2009 | 08:46 AM
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Do you have a link? I went through the site, but couldn't find the part under fiberglass nor exhaust.
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Old Oct 1, 2009 | 03:34 PM
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The only covers I ever saw --sold alone-- were made of ABS plastic, NOT fiberglass. Of course ABS wouldn't be as forgiving to heat if you routed the pipe too close. Really, I didn't think it was a good idea to run any decent size pipe thru the exhaust cutout.

The original company that made "SideEffects" sidepipes doesn't have any more covers either. They contracted out the covers to a 3rd party fiberglass company that would want a run of 100 units to make them again.

Before I put the set (that took me two yrs to find) on my car, I thought about making cast molds of the outlets in case of damage. I didn't get around to it, but may wish I did some day.

You do have to be careful around town to avoid tearing them up. Mine came with "jacking plates" that hang 1/2" lower than the fiberglass covers. They hit every now and then, but I've been lucky to avoid damage. Those plates help.

As for making your own, I put down some thoughts a couple of years ago. If you do a search, you can probably find it.

I did lots of thinking about how to route pipes straight back from the manifolds w/o turns. And, seriously considered how to get decent muffling to avoid excessive sound. I decided there were too many potential sound, fitment, and clearance issues to make/remake a set until acceptable.

If your motor's not "built", there's nothing wrong with finding a used set of SideEffects and connecting your headers to them. My best calculation has them good until 350rwhp. You can use them above that but some loss will occur.
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Old Oct 2, 2009 | 03:35 AM
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theres a "well used" set on ebay right now.
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Old Oct 2, 2009 | 11:37 AM
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sorry I toook so lonf to reply here is what I was talking about to fab up.

http://www.mamotorworks.com/corvette?frame=1.1319
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Old Oct 2, 2009 | 01:46 PM
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Originally Posted by Firevette
theres a "well used" set on ebay right now.
I looked. That set has "custom" sound chambers. That's something I'd want to see pics of before purchasing (if I were a bidder). While it's certainly possible to fabricate a custom set, I'd want to know why and how well they're made.

The sound chamber also serves as the front mounting point for the sidepipes. And, the stock chambers are heavy-duty alum castings. If done incorrectly, I'd wonder about frame vibrations, canister burn-out, or other ways for it to go wrong.
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Old Oct 2, 2009 | 01:49 PM
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Originally Posted by pologreen1
sorry I toook so lonf to reply here is what I was talking about to fab up.

http://www.mamotorworks.com/corvette?frame=1.1319
Does anyone else get a site maintenance msg when clicking on this link? I've seen the EXACT same msg for 3-4 sites recently. It's probably a canned msg from the developer's toolbox, but I want to eliminate a bug issue.

Thanks.
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Old Oct 2, 2009 | 02:02 PM
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I had no problem with it. Using Google chrome.
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Old Oct 2, 2009 | 02:25 PM
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Originally Posted by pologreen1
sorry I toook so lonf to reply here is what I was talking about to fab up.

http://www.mamotorworks.com/corvette?frame=1.1319
I got the C3 ones

1969-Style Side Exhaust Covers, reproduced in fiberglass, come unpainted so you can spray silver and black to either simulate original chrome or paint to match your Corvette's color. Save over $1,500!! Fits 1968-82 Corvettes.
Spray paint it silver to simulate the original chrome??
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Old Oct 3, 2009 | 04:56 AM
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Originally Posted by GREGGPENN
I looked. That set has "custom" sound chambers. That's something I'd want to see pics of before purchasing (if I were a bidder). While it's certainly possible to fabricate a custom set, I'd want to know why and how well they're made.

The sound chamber also serves as the front mounting point for the sidepipes. And, the stock chambers are heavy-duty alum castings. If done incorrectly, I'd wonder about frame vibrations, canister burn-out, or other ways for it to go wrong.
Yeah.. If I were to do it, all I would use would be the covers. Id fab something to exit there....and you better bet it wouldn't have muffflers of any sort.

I actually wish someone was reproducing these.
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Old Oct 4, 2009 | 01:35 PM
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Ebay Link

Originally Posted by Firevette
theres a "well used" set on ebay right now.
Well used? You weren't kidding...

$450 seems a bit steep for damaged parts... I'd really only be interested in the covers myself.

Last edited by 89 Vett; Oct 4, 2009 at 01:40 PM.
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Old Oct 13, 2009 | 12:51 PM
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Well, I decided to go with replacing the regular exhaust since I can't locate the covers. I was on the fence anyway... still surprised they aren't out there given the interest that seems to be present.
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Old Mar 21, 2010 | 09:17 PM
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I've got them and love them (the Side-Effects kit). I recently had them re-done at a local autobody shop. All of the scratches, dents, and cracks removed. The sounds is fantastic, and the look (now, after having them refinished) is great.
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Old Mar 23, 2010 | 10:18 AM
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http://www.mamotorworks.com/corvette.html?frame=1.6009

I want to see these on a C4.....

forget the covers!
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Old Mar 23, 2010 | 04:59 PM
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Originally Posted by 198T7VETTE
http://www.mamotorworks.com/corvette.html?frame=1.6009

I want to see these on a C4.....

forget the covers!
That would be crazy! I wonder if it could be done!?!? I guess you would have to get custom headers made and find a way to mount the chambered side pipe... Bet it would sound awesome!!!
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Old Mar 31, 2010 | 10:14 AM
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Can someone photoshop the four into one sidepipes on a C4?
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