removed around 1000 miles to put a supercharger on.

Injector information:
Bosch part # 0 280 158 049
GM # 12569113
USCar connector
65.2 mm overall length
52 mm O-ring to O-ring
4.3 mm tip length
15 degree spray cone
4 hole injector
high impedance

The LS2 injectors flow 33.9 lbs/hr (4.27 grams/second) at 58 psi (400 kPa) fuel pressure and 29.3 lbs/hr (3.70 grams/second) at 43 psi (300 kPa).

Only thing missing is the upper (top) o-rings which are available from any GM dealer

$70.00 or BO shipped in the cont. US USPS priority mail

 

Will these work on my 99?

 

They are shorter than std LS1 injectors so I think not. Unless you found a way to move the rail down. You would also need wiring adapters from Casper