So..and this is foolish I know. How can I tell if I have a passive or an active system?
What is the best tactic for tapping and plugging these holes without doing damage?
Is it even worth the extra $600 or so a mechanic is going to charge me, or should I just stick with manifolds?
hey all -- I went out and bought this system:
http://www.summitracing.com/parts/sum-cbjj111/overview/year/1987/make/dodge/model/w150
For my 1987 W150 with a 318, but my mechanic told me that it is impossible to fit headers to the truck because the engine has "air injection cylinders" which I...
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