Cc's Carbon Vs. Aluminized Exhaust

[Rich C.]

I was getting ready to order a complete exhaust system from Corvette Central. You can get it in carbon or aluminized. Obviously either would lose points for lack of GM part #'s, etc. But would you gain a few points for the carbon system over the aluminized system?

'73 LS-4 454

[Terry M.]

Re: Cc's Carbon Vs. Aluminized Exhaust

I was getting ready to order a complete exhaust system from Corvette Central. You can get it in carbon or aluminized. Obviously either would lose points for lack of GM part #'s, etc. But would you gain a few points for the carbon system over the aluminized system?

'73 LS-4 454

Yes you will. There is a revised Standard Deduction sheet that was handed out at the Novi National Convention that includes a new deduction for aluminized parts (that were not originally aluminized -- and I can not think of anything on a 1972 and earlier Corvette that was aluminized from St Louis). I don't currently have my sheets at hand, and can not recall what it is, but there is a percentage deduct for aluminized parts. Perhaps someone else has that revision at hand.

[Page C.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Terry,
The revised standard deduction sheet (July 2011 Rev. 4.0) states the minimum deduction for aluminized parts is 25% for any part not originally aluminized and 50% for stainless steel parts that were not originally stainless steel. Remember these are the minimums not the maximums
Page Campbell

[Terry M.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Terry,
The revised standard deduction sheet (July 2011 Rev. 4.0) states the minimum deduction for aluminized parts is 25% for any part not originally aluminized and 50% for stainless steel parts that were not originally stainless steel. Remember these are the minimums not the maximums
Page Campbell

Thanks for the info Page.

[Patrick H.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Net difference is probably 2-5 points at most, given all the configuration differences between CC pipes and originals.

I'd get them aluminized and forget about fighting the rust. And, I did.

Patrick

[Edward J.]

Re: Cc's Carbon Vs. Aluminized Exhaust

I am with Patrick, rust looks bad on the undercarriage, aliuminized looks much cleaner, Rich unless your heading for a Duntov a few points are gained with the fire ext. and decal + driving points.

[Michael W.]

Re: Cc's Carbon Vs. Aluminized Exhaust

A rusty carbon exhaust system may lose more condition points than an aluminized system would on originality.

[John H.]

Re: Cc's Carbon Vs. Aluminized Exhaust

I can not think of anything on a 1972 and earlier Corvette that was aluminized from St Louis).

Terry -

I don't have the '63-'66 Engineering specs package handy, but on 67's, the RH muffler shell and end caps were stainless steel, with an aluminized cover, and the LH muffler shell, end caps, and cover were aluminized steel. Pipes were plain steel.

[Stuart F.]

Re: Cc's Carbon Vs. Aluminized Exhaust

My aluminized system has been on my car now since 1992 and still looks pretty good. You can just see the beginning of some rust lines at the seams of the pipes. From behind or just a casual glance under the car it still looks super - all welded, no clamps dragging for weeds, etc.. The heat shiels were new and coated by me at that time and they still look new. BTW, I've always parked over sealed concrete or a vinyl matt. Not living in the salt up north, my main concern is for moisture under the car while parked.

Stu Fox

[Alan S.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Hi Rich,
I recently put a welded aluminized system from CC on my 71. I think the aluminized system looks good on an obviously restored chassis.
I was actually surprised how well it fit, (it was very easy to install), and it gives a very clean look from the rear of the car. I was able to position the pipes up close to the strut-rod bracket without any problem so the pipes don't give a 'droopy' appearance.
I did find it's easier to do the muffler black-out before installation, rather than after.
Regards,
Alan

[Rich C.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Awesome feedback, any recommendations for blackout paint? Especially on hot mufflers!

'73 LS-4 454

[Edward J.]

Re: Cc's Carbon Vs. Aluminized Exhaust

Rich since the factory did a sloppy job and no two car were alike, its your call on how much ( less is better), The rear panel of muffler as did the shell bottom and sides were blacked out and threre was nothing on the pipes. Some one Terry M. or Patrick H. may be one a few that have see some original cars, I have seen some very low milage cars but the muffler are generally the first thing to go.As I am lucky to have a local chapter member with a 7to 8k (5 Star car).