[Rangore]

Originally Posted by 3rdgen3

The biggest reason they sound different for starters, its a different engine family and totally different design. The only thing the LSx and LTx engines share in common is the 4.4" bore spacing. NOTHING else.

Other factors include, All aluminum engine's tend to give off an echo that's hollow sounding, and the MASSIVE in comparison intake valves smacking the seat gives off a noticeable sound pitch.

Oh, and dont forget the firing order change. 1-8-4-3-6-5-7-2 SBC/LT1 firing order is another reason the revised firing order of 1-8-7-2-6-5-4-3 of all LSx engines will drastically change the 'sound' also, but it also makes the engines much smoother.


Theirs a few other factors at play also, all 4th gens have a single 'I' pipe exhaust with a Y-pipe (stock cars anyways) and all 5th gens are factory true dual.

Thank you. Awesome answer!! Exactly what I was wondering and easy to understand.