Set of 8 NGK TR5 Spark Plugs for LS EnginesSet of 8 NGK TR 5 Spark Plugs for LS Engines TR 5 spark plugs are nearly identical to the TR 55, but come with a tighter plug gap out of the box (. 035 instead of . 050). These plugs are great for applications that require a tighter plug gap, but need a hotter plug than the TR 6 (TR 5s are one heat range hotter than TR 6s). NOTE: If you're running a naturally aspirated, bolt on, combination, we recommend NGK TR 55 plugs. Heat range 5, copper core.

Constructed from proprietary precision injection molded polymer

This newly formulated super-alloy demonstrates superior fatigue cycle life

This cam works well in 5

They stand behind their products in saying you will not find a better fitting

525cc/min (50lbs/hr) at 43

5/16" diameter

the Mid-Rise manifold is an excellent choice for street and performance street/strip applications with a powerband from 1

30mm Pistons w/ Low Friction Teflon Seals

Custom fit for make and model listed

They use a 6-pin late model connector that works with late model wiring harnesses

Another huge improvement is their SPEEDbleeder end - allowing you to simply crack it open one time and close it once the air is out of the system

Stall Speed Options - Factory (1800-2000 RPM) up to 2600 RPM