Sound would not change noticeably.
Do a photo-shop on them cut back with chrome tips welded on.
Not the flimsy ones from Can. Tire.
There are some nice chrome tips available; about 6 inches long with thick walls from muffler shops.
I used a few of them; very nice!
__________________
1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD!
1995 seafoam-green 993 C2, LSD, Sport seats.

Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ".