I just bought my car and it does not have RPO B4Z (IROC package), but it does have B2L (PERFORMANCE PACKAGE & ENGINE PACKAGE V8 5.7LPFI)

Does B2L designate IROC on my car? If not what code does?

I'm 99.99% sure the car is all IROC.

Thanks,
Ernie

 

Z28

 

Drew I hope you are wrong but if not the car is a great clone.

The dash, wheels, grill all have IROC markings. Besides that the car looks to be ALL stock.

Anybody else have an input?

Thanks,
Ernie

 

RPO B4Z was only used when the IROC-Z was an option on the Z28 (1985 - 1987). For these years, IROC-Z's will have both RPO Z28 AND B4Z. Z28's have only RPO Z28.

When the IROC-Z became the base sport model replacing the Z28 in 1988, only RPO Z28 is used (thru 1990). Chevrolet decided not to use B4Z for the IROC-Z, but RPO Z28. So your car is the way it's supposed to be. Drew got it right, it will show RPO Z28.

 

I agree. My '89 does not have the B4Z package, but it does have the Z28 package and all the IROC markings.

 

Its just as Willie said.

 

Whew......

A real IROC.

Good!

Thanks for the help guys.

Ernie

 

Z28.

B2L is the same as L98, just indicates the car has a 350 TPI. Z28 identifies the Iroc package from 88-90 since effectively all Z28's had the Iroc package. So since your car has an L98, its a Z28, and since all 88-90 Z28's were Iroc's, its an Iroc.

I was just too lazy yesterday to elaborate.

 

I feel good now!

:lala:

Thanks,
Ernie