69 427 Manual Exhaust System

[Lawrence S.]

Guys,

I am in need of the above for a future flight judged car. I prefer to use Gardner and Eddie is 10 weeks out. As an alternate I can get the system that Corvette Central is offering now. My question is this, has anyone had any issues with a Corvette Central system on a flight judged car? I would buy the welded aluminum system. I know I will lose points for not going raw steel but I am willing to take that hit. Please let me know your thoughts.

Thanks

Lawrence

[Patrick H.]

Re: 69 427 Manual Exhaust System

The points difference between a Gardner system and a Corvette Central system is minimal, if any. You would take the usual deductions for either one being aluminized, and only a small deduction if warranted for configuration.

You can lose as much for the incorrect clamps and tips as you can for the rest, so pay attention to those details.

[Mark E.]

Re: 69 427 Manual Exhaust System

Lawrence,

Here's my thread on receiving and installing CC's welded exhaust:

https://www.forums.ncrs.org/showthread.php?126233-What-do-you-think-of-this-Corvette-Central-exhaust-that-arrived-(photos)

As Patrick advises, no replacement system is exactly like the original (not double walled, no wrinkle bends are two big differences) but I am pleased with fit and overall quality. When I shopped a few years ago, only CC offered welded mufflers. That may be different now but I don't know.

It sounds like originality is a major consideration for you. But you can upgrade the stock 1969 2" system to 2 1/2" as used in 1970-74 big blocks.

[Patrick H.]

Re: 69 427 Manual Exhaust System

But you can upgrade the stock 1969 2" system to 2 1/2" as used in 1970-74 big blocks.

However, if the judges detect this it's an additional deduction.

[Lawrence S.]

Re: 69 427 Manual Exhaust System

Thanks guys.

[Patrick B.]

Re: 69 427 Manual Exhaust System

Lawrence,

Here's my thread on receiving and installing CC's welded exhaust:

https://www.forums.ncrs.org/showthread.php?126233-What-do-you-think-of-this-Corvette-Central-exhaust-that-arrived-(photos)

As Patrick advises, no replacement system is exactly like the original (not double walled, no wrinkle bends are two big differences) but I am pleased with fit and overall quality. When I shopped a few years ago, only CC offered welded mufflers. That may be different now but I don't know.

It sounds like originality is a major consideration for you. But you can upgrade the stock 1969 2" system to 2 1/2" as used in 1970-74 big blocks.

[Mark E.]

Re: 69 427 Manual Exhaust System

It sounds like originality is a major consideration for you. But you can upgrade the stock 1969 2" system to 2 1/2" as used in 1970-74 big blocks.

I said this, but the transmission hanger bracket will need to be changed from 2" to 2 1/2"... and you'll need to research if the exhaust manifold donut connection will fit... maybe not.

[Joe L.]

Re: 69 427 Manual Exhaust System

I think one of the exhaust manifolds on a 70 and up big block is different from the 65-69 manifolds. You would need the 68 2 1/2” system. In case the 68 system is also 2”, then the 67 forward pipes with the 70 rear pipes with mufflers would provide a 2 1/2” system for a 69 car.

Patrick------


Yes, the left side BB manifold for 1970-74 was different than the 1965-69. So, when retrofitting a 2-1/2" system to a 1969 BB, one needs to use the 1968 system.

All 1968 Corvettes were 2-1/2" systems----base engine to L-88.