Join Date: Mar 2010
Location: Pittsburgh, Pistolvania
The LS4 TB is about 7mm larger than the LSJ one and gives you more power and torque on the bottom end and a slight bit more boost at low RPMs. It doesn't really do much once you get in the higher RPM levels.
The reason why the ride is 'rough' on the LS4 TB is primarily due to it having a very quick throttle response.
You will need to tune your G5 specifically for it... so make sure to tell that to whoever is tuning you.
GM Stage II | 2nd Gen Projectors | 5000K Low Beams | 3000K HID Fogs | LED Tails| SS/TC Seats
▲RIP 2007 G5: Totalled 1/26/10▲