ok.. I have a 2002 ss m6 my mods are (!cags, !iat, free cold air intake, slp loudmouth, bilstein suspension, alburn differential, lid, k&n)...

I've been told my car should be running a low 13.2-12.9 in the 1/4 by member of this board

I've been thinking about buying Gm 4.10 gears($199.99) and have my local chevy dealership installthem..(dad is sales manager)... will I need programming for the mod?... Also how long does a mod like this take to install?

Next, I've been looking at the SLP LT Headers... I realize the combination of Loudmouth and LT is loud... the louder the better ... how long will this install take if professionally done(by dad's dealership), also.. will this need programming for the mod?

What should my 1/4 time be with just the 4.10 gears, with just the LT,.. then with both the 4.10s and the LT headers be?

thanks guys

Steven

 

You will need some tuning with those gears