63 Exhaust Questions

[Ralph P.]

Got a buddy looking at at a 340 SWC with apparently correct block & heads , but, questions on cast manifolds and/or pipes.
1. What manifolds are correct for various HP's .... size & numbers?
2. size & numbers of factory exhaust pipes for various HP's ?\

THANKS

[Edward J.]

Re: 63 Exhaust Questions

Ralph,63 SHP engines (340/365FI) Motors have a 2 1/2" exhaust manifolds and the last three digits casted into the front and rear on pass side manifolds is 901/902, Pipe are also 2 1/2" also, The 250 h/p engine has a 2" system and the 300hp std. is 2 1/2" AND THE 300HP automatic is a 2" system. The pipes are front and the rear pipe w/muffler welded at front of muffler from factory.

[Ralph P.]

Re: 63 Exhaust Questions

Ralph,63 SHP engines (340/365FI) Motors have a 2 1/2" exhaust manifolds and the last three digits casted into the front and rear on pass side manifolds is 901/902, Pipe are also 2 1/2" also, The 250 h/p engine has a 2" system and the 300hp std. is 2 1/2" AND THE 300HP automatic is a 2" system. The pipes are front and the rear pipe w/muffler welded at front of muffler from factory.

Thanks, Ed.....