Your suggestion

[haks310]

Don't know how hard it will be to get some parts in Saudi Arabia and I am sure emissions are not a concern.

Intake manifold
Camshaft
Exhaust: long tube headers and hi flowing muffler
Heads...Vortec heads work great
CAI
New injectors and fuel pump once you start climbing in HP

Once you get all this out the way you can go with a custom chip, go with Ed Wright over at fastchip.com

 

[blackcoffee]

Woah! Saudi Arabia?! Yeah shipping this stuff from the states is gonna cost you a fortune! How'd you find a 2 door hoe in Saudi Arabia!?

 

[bowtiefreak]

Hello Guys
How much inches will be excellent in the tahoe and not make problem with the Engine in future??

I am assuming you mean cubic inches (engine size). In that case a 350 or larger. You can always make a bad ass 305 or 350. But as the saying goes "there is no replacement for displacement" which means the bigger the better.

I run a 383 and I love this motor. Makes a ton of torque with no power adders like NOS or a super charger.