160 degree replacement thermostat.
Helps keep your engine running cool!

Ngk TR-6 Spark plug.
This plug is one range colder than the stock TrailBlazer SS plug.

Why run a one range colder plug?
-Advancing timing by 5* will raise cylinder temperatures by up to 130 degrees.
-Higher cylinder temps will bring the spark plug firing end temperature closer to the pre-ignition range.
-The more you lean an engine out the hotter the cylinder temps will be.
    As cylinder temperatures increase all of the combustion chamber components temperatures rise as well and can lead to detonation. The end of this plug will cool faster between firing to help prevent detenation. We use this plug in all of the TrailBlazer SS we tune. 

MSD 8.5mm Super Conductor Wire Set.

MSD's 8.5mm Super Conductor wire sets have a special helically wound core that has just 40-50 ohms of resistance per foot--but with an RFI suppression equal to a 1,500 ohm wire. In fact, each foot of finished wire features 40 ft. of tightly wound copper for superior conductivity. A tough, 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps the current guided to the plugs. Underneath the high-temperature boots, dual crimp stainless steel terminals feature snap-locks to ensure a secure fit.

-Available in 215cc and 225cc intake runners sizes
-Fully assembled CNC Machined aluminum heads
-Intake Port Shape: Cathedral
-Exhaust Port Shape: Oval
-Valve Springs: Dual
-Retainers Included: Yes
-Titanium Retainers 
-Locks 7 Degree 
-Valve Stem Seal Style: Viton® fluoroelastomer
-Intake/Exhaust angles 13.5*
-Notes: Must be used with roller rocker arms

-Torque to yield bolts are good for 1 use on engine.
-Bolts are 5mm shorter than 1997-2003 bolts.
-Use for 2003-up LSX Engines

-Head Gasket
-Multi Layered Steel Construction
-4.020 in. Bore
-Compressed Thickness .051"
-LS2 Head Gaskets

Underdrive pulleys work by slowing down the speed at which the engine accessories are spun which frees up extra Power and Increases gas mileage! This pulley is a 25% underdrive and Comes with overdrive pulley for alternator (for vehicles with sound systems or the need for increased alternator charge.)

-Comes with a new Crankshaft Pulley bolt, the stock bolt is torque to yield and is one time use only!

-Gain up to 10 H.P.

-Requires new (shorter) belt sold seperate below.

SFI dampers spin-tested to 12,500 rpm with an SFI-18.1 rating. The carbon steel dampers have an injection-molded and bonded elastomer, and a highly polished baked-enamel finish, so they look as good as they perform.