View Full Version : upgrade on stock 04 cobra question?

11-16-2009, 03:19 AM
im about to install a 2.81 in. pulley with a diablo predator tune and a full slp loudmouth exhaust(headers,x pipe,catback).my question is it safe to run these mods on a stock motor,will the boost and hp increase be to much?and how much additional hp can i expect from these upgrades.i was thinking 60 hp from the pulley and tune and about 30 hp from the exhaust. and the car has 106,000 on the spedo but is in top condition very tight drives and feels like it has about 30,000 on it so its not beat.very well maintained

11-16-2009, 11:52 PM
wow not everyone at once pls slow down with the replies.........lol

11-16-2009, 11:56 PM
That's going to give you around 465-480 at the rear wheels. It shouldn't be a problem to run that combination. :thumbsup:

11-17-2009, 12:32 PM
on my 04 with a 2.76 pulley I made 482 with just a catback.

11-17-2009, 07:28 PM