Anyone have any reccomendations for upgrading the stock 496 Mag exhaust manifolds and risers?
I currently have a stock system with Corsa diverters and a Y Pipe.
I have looked into Custom Marine's Sport Tube system, and they look bitchen but pricey at 4K
What about Eddie Marine Thunder, Gil Marine or some others?? Custom Marine boasts 50-60HP gain. Would you see some gain from these other Manifold Mfrs. if the Mag could breath better. Merc claims they are high performance manifolds and risers and the EMI Thunders look alot like the Merc stock manifolds. I have the standard 375HP 496 Mag and I just can't justify $4,500.00 for the Custom Marine Headers and install costs, I would rather spend 11K and pick up a fresh 496HO version.
Any suggestions,
Thx,
R-