what kind of horsepower gain will you get from a stock ls1 to the ls6 and which would be the best brand.

 

the only brand ls6 intake is gm. they made it.

and your looking at 10-15 hp

 

10-12 with a ls6 cam an heads pkg but on a stock ls1 its more like 7-10

 

thanks I won't to get some more horsepower but I don't really won't to go into the motor (cam, heads). So I guess I'm looking for the best bang for the buck.

 

So go with the FAST 90/92 set up

 

Under drive pulley, electric water pump,headers ,and ls6 Heads you can't go wrong.

 

what exactly is a underdrive pulley and how much hp will this produce.

 

UDP--$250
Meziere Electric Water Pump-$550
Kooks L/T headers-$900
LS6 heads-$1200
Knowing that you could of saved almost $2500 and got nitrous instead and be twice as fast-PRICELESS!!!!!

 

try an BBK SSI intake..flows better than LS6 and not much more expensive

 

not trying to be a butt hole or anything but the question has been asked before

 

underdrive pulley replaces the crank pulley, and its smaller, so it spins the accessories (alt, ps, ac) slower, which reduces the parasitic loss on the engine.

they are not huge power mods...maybe 5-7hp...but they do seem to increase the throttle response and rev-up speed