Thread: Realistic gains to expect from an intake?

Originally Posted by SnowFlake

Both of these comments are entirely false.
Stock L67's make 180-190whp, not 223whp.
Headers usually add 15-20whp without a tune or a pulley.

I've had dozens of these cars on a dynojet. To say they lose power with headers is ludicrous.

I've "felt like" I lost some low end when I added headers with stock pulley, but gained a good chunk of top end. No dyno numbers to verify this, though.