1964 impala convertible exhaust
- Thread starter curvesman
- Start date
Same basic frame dimensions other than a couple of extra mount cushions and some reinforcements.
In my opinion....Shafer's Classics has the finest exhaust. I am a dealer and sell to the customer at Shafer's retail price.
All of their pipes are computer mandrel bent. This means NO WRINKLES in the pipes. The ends of the tailpipes are cut off square and then the bottom half has the 45 degree bevel just like originals. Pipe is furnished in either aluminized or stainless. 95% of all systems I've sold are aluminized. I also use Show Cars dual exhaust hanger kits. Warren Shafer sent me his very first set of 2 1/2" tailpipes and we had those installed on a customer's car in St. Louis about 8 years ago. They fit like a dream!!! Here is the 63-64 425HP kit with original muffler...http://www.shafersclassic.com/OnlineStore/product.aspx?id=14075 Yes, Shafer's are higher price but the quality of the pipe and bends to me is important.
I looked up the seller mentioned above and you can see the difference in the bends.....especially 2 1/2" head pipes. But the original GM pipes were the same way as these. The difference is the mandrel bending process.
All of their pipes are computer mandrel bent. This means NO WRINKLES in the pipes. The ends of the tailpipes are cut off square and then the bottom half has the 45 degree bevel just like originals. Pipe is furnished in either aluminized or stainless. 95% of all systems I've sold are aluminized. I also use Show Cars dual exhaust hanger kits. Warren Shafer sent me his very first set of 2 1/2" tailpipes and we had those installed on a customer's car in St. Louis about 8 years ago. They fit like a dream!!! Here is the 63-64 425HP kit with original muffler...http://www.shafersclassic.com/OnlineStore/product.aspx?id=14075 Yes, Shafer's are higher price but the quality of the pipe and bends to me is important.
I looked up the seller mentioned above and you can see the difference in the bends.....especially 2 1/2" head pipes. But the original GM pipes were the same way as these. The difference is the mandrel bending process.
gas mileage 
I said potential,it all depends on how well you tune it,and drive it.For example; If you drive it like MRHP or Yellow wagon,you know,comfortable,both feet flat on the floor,you're gonna burn some. Tripower on the other has a 421 inch,450 horse engine in his 61 that can pull 17-18 mpg on the road.