[LS1] How much power increase can I expect from...

[freefallin]

OTR CAI, LT extractors 1 7/8, cat back and tune.

Like how much horsepower and torque can I gain and how much can I shave off my 1/4 mile?

Car is a VZ SS LS1 bone stock atm.

 

[Munz]

1 7/8 extractors are overkill for a stock LS1 - 1 3/4 would suit better, change your cats to 100cpi or remove them as they are big restriction on VZ.

With those mods you will have around 300-330rwhp (225-240rwkw).

1/4 times I'd say around a high 13sec @ 100mph

 

[lowandslow]

1 7/8 will be fine. You won't notice any difference unless you like looking at dyno charts.
If it's an auto would prob make about 230rwkw manual, 240 or just above. Should run the 1/4 mile in a healthy mid 13 second range at around 104 mph.
Your next point of call after this if your car is an auto is a stall converter. 3500-4000 lock up converter will see you into the mid low 12's.
If manual, 3.9 or 4.11 gears along with a truetrac LSD.

 

[freefallin]

1 7/8 will be fine. You won't notice any difference unless you like looking at dyno charts.
If it's an auto would prob make about 230rwkw manual, 240 or just above. Should run the 1/4 mile in a healthy mid 13 second range at around 104 mph.
Your next point of call after this if your car is an auto is a stall converter. 3500-4000 lock up converter will see you into the mid low 12's.
If manual, 3.9 or 4.11 gears along with a truetrac LSD.

Awesome info mate! Funny you mentioned gears because i was actually gonna ditch the extractors for gears as my budget currently doesn't allow both.

230rwkw?? 1/4 mile in mid 13s@104 mph?? Exactly how much increase would that be from stock??
And any recommendations on where to buy gears from?? Brand?? Its an A4 and i'm thinking 3.91.
Doesn't have to be from Australia. It could also be from the States since i am having it shipped either way.