1967 Corvette 427-435 factory side exhaust had no gain in Performance

[Guest]

Factory Side Exhaust on 67 427-435 never gain any better Performance but could of loss some , back in 1967 it's true anyone ordering a new 67 427-435 Corvette and wanted maximum Performance and HP would order N11 Off Road Exhaust then the N14 Side Exhaust, I understand the N14 would work great on lower HP Engine and Small block, so my question is a 1967 Corvette 427-435 with factory N11 Exhaust system be more valuable then one with a N14 Exhaust system, Danny

[Darryl D.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Factory Side Exhaust on 67 427-435 never gain any better Performance but could of loss some , back in 1967 it's true anyone ordering a new 67 427-435 Corvette and wanted maximum Performance and HP would order N11 Off Road Exhaust then the N14 Side Exhaust, I understand the N14 would work great on lower HP Engine and Small block, so my question is a 1967 Corvette 427-435 with factory N11 Exhaust system be more valuable then one with a N14 Exhaust system, Danny

Seems like MOST people want the noisy side exhaust based on all the car you see them on today.

ALL cars perform better with the regular under car exhaust. Have you ever looked inside of the original side exhaust pipes? They are actually reduced down to 1 5/8"cdiameter. The factory 2 1/2 are that to the muffler and after the muffler go to 2". The smaller 2" exhaust at 2" all the way.
I have had several cars with both factory and aftermarket side exhaust and HATE them. Driving at highway speeds you can't carry on a conversation, hear your radio and your ears are ringing after an hour of driving.

[Mark E.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

...so my question is a 1967 Corvette 427-435 with factory N11 Exhaust system be more valuable then one with a N14 Exhaust system, Danny

Don't confuse desirability/market value with performance.

[Guest]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Sure I understand desirability , if your going for the looks and sound , but these 427-435 and L88 were made for performance the N11 was the exhaust system to have .

[Michael J.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

To me, side exhaust is much more desirable due to the way it looks and sounds on any Corvette, if it was original. Therefore, more valuable to me.

[Tim G.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Side exhaust cars that came that way from the factory will always be extra desirable. If you think about all the cars built in the performance era, how many were delivered with side exhaust? A few Cobras and early Shelby Mustangs were it aside from the Corvette. If they ever built a Camaro with factory side exhaust (they didn't), just think how much that would go for.

[Patrick B.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Side exhaust cars that came that way from the factory will always be extra desirable. If you think about all the cars built in the performance era, how many were delivered with side exhaust? A few Cobras and early Shelby Mustangs were it aside from the Corvette. If they ever built a Camaro with factory side exhaust (they didn't), just think how much that would go for.

Some of the Baldwin-Motion modified 69 Camaros and Chevelles used what looks like C2 Corvette sidepipes. They look a little hokey, but they probably have a lot of collector's value.

[Gene M.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

It’s all personal taste some like pipes some don’t. Personally I’d not put an exhaust restriction down to 1 5/8” diameter. I once had side pipes on my car but all 2” pipe the mufflers too. Yes a custom job. It all fit under the GM covers. But soon got sick of the loud noise, took them off and sold them.

Today I prefer the clean lines and under car N11 exhaust. In fact I prefer the clean look of a small block hood. A bulge or bump just upsets the clean smooth look. But as I say personal taste dictates one selection.

Today if one wants big block power in a small block it is more than possible. Not NCRS correct but neither is adding pipes.

[Steve B.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Side exhaust cars that came that way from the factory will always be extra desirable. If you think about all the cars built in the performance era, how many were delivered with side exhaust? A few Cobras and early Shelby Mustangs were it aside from the Corvette. If they ever built a Camaro with factory side exhaust (they didn't), just think how much that would go for.

Agreed, while N11 will probably perform a little better it does not have the appeal with collectors that a true side exhaust car has. The sound and looks of a side exhaust car is intoxicating.

[Bill M.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

I prefer an original side pipe car to an under car exhaust just for the look and the sound. But in the 70's and 80's I could go all day long with factory or hooker side pipes but not anymore the drone gets to be to much.

[Gene M.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

If one likes the looks of side exhaust but not the noise.........simple solution. Install the side pipe covers and run under the car exhaust.

[Bill M.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

that will really have people scratching their heads

[Darryl D.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

It as been eluded to in posts above but it needs to be directly said, If you add side exhaust to a judged car you will be dinged points as the trim tag will tell you if a car had them from the factory or not.

[Michael J.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Actually no, the trim tag contains no such information.

[Peter H.]

Re: 1967 Corvette 427-435 factory side exhaust had no gain in Performance

Hello michael..the trim tag identified the plant the body was made in..only st louis was able to install side exhaust..or was it ????????????? Peter...