Time For New Exhaust System
05-31-2012, 11:20 PM
#1
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Time For New Exhaust System
I have a 1973 L48 Automatic Trans with the stock 2" exhaust system. I would like to replace it with a 2.5" system. Are there any issues with doing this?
The only thing I can see might be a problem is the front exhaust pipe hangers, which is easily changed if necessary.
The only thing I can see might be a problem is the front exhaust pipe hangers, which is easily changed if necessary.
06-01-2012, 07:43 AM
#3
Racer
I bought the off-road kit from Corvette Central and bolted it directly to the existing manifolds. Are you going to be making more power with your engine? If not, 2" should be sufficient. Look around for articles about the need for larger diameter exhaust so you don't spend more money than you need to.
06-01-2012, 10:36 AM
#4
Burning Brakes
I bought the kit from Magnaflow. 2.5" s/s with muffs and an x-pipe. I had long tube headers and my exhaust guy mated the two together. It tucked up nicedly under the car. I chose to have the mufflers up under the rear too with the tips just barely visible.
I love the system now. Sounds much better and freed up some HP. I have 4" ground clearance to the header flange.
I love the system now. Sounds much better and freed up some HP. I have 4" ground clearance to the header flange.
06-01-2012, 11:43 AM
#5
Racer
Another Corvette Central customer. Great fit, easy install, very happy.
06-01-2012, 02:14 PM
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Team Owner
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Hi,
Another satisfied CC exhaust customer.
Maybe even FREE shipping right now?
Regards,
Alan
Another satisfied CC exhaust customer.
Maybe even FREE shipping right now?
Regards,
Alan
06-01-2012, 03:34 PM
#8
The actual performance benefits of going to a 2.5 inch system may not be worth the expense, unless you're planning on making modifications to the motor that would dictate a larger exhaust system.
Of course, if you need to replace the old system because it's rusted, then I say go ahead with the 2.5 system. It won't hurt your performance and will give you extra capacity for future motor mods.
Of course, if you need to replace the old system because it's rusted, then I say go ahead with the 2.5 system. It won't hurt your performance and will give you extra capacity for future motor mods.
06-01-2012, 04:14 PM
#9
The actual performance benefits of going to a 2.5 inch system may not be worth the expense, unless you're planning on making modifications to the motor that would dictate a larger exhaust system.
Of course, if you need to replace the old system because it's rusted, then I say go ahead with the 2.5 system. It won't hurt your performance and will give you extra capacity for future motor mods.
Of course, if you need to replace the old system because it's rusted, then I say go ahead with the 2.5 system. It won't hurt your performance and will give you extra capacity for future motor mods.
06-01-2012, 05:06 PM
#10
Team Owner
06-01-2012, 05:34 PM
#11
Melting Slicks
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St. Jude Donor '08
If you got the stock 2-1-2 system with the catalytic converter and you go to a full dual 2.5 in. exhaust, you'll easily pick up another 20 HP or so, I remember one of the forum members proved that in a dyno pull a whole a go.