do i need a tune after header and ory is installed

**cheeseburger** · 09-12-2009, 09:24 PM

i am very new with ls1s will i need to get a tune if i put headers and a ory pipe on my 98 z28

**DaddySS** · 09-13-2009, 02:00 AM

Originally Posted by cheeseburger

i am very new with ls1s will i need to get a tune if i put headers and a ory pipe on my 98 z28

Yes, you will want a tune. Modify the VE and timing tables to take advantage of the new flow and tune out the rear 02 sensors.

**INMY01TA** · 09-13-2009, 06:04 AM

Not necesary but wouldn't hurt. If you plan on swapping the cam in the nearby future I'd wait. If this is your last performance mod for a while may want to do it now. Most tuners charge the big hit ($300-$500) initially for the access to their software. Future tunes usually they just charge for the dyno time. (prolly $100 per hour)