I have Precision Proformance 180's, as Mark D has.
Negatives
- a b!tch to change the plugs
-milder tone at idle over reg headers (but I think my IR manifold smooths out my cam as well)
-you may (will) have to cut/weld the collectors to make the mufflers exit perfectly
-expensive
Pro's
-a sound like no other car (some like the sound, some don't. Much higher pitch)
-Precision headers allow you to use the deck struts (BIG ++++)
-Bling
Remember, there is a HUGE sound difference whether you exit straight out or angle out the original holes.
Also, I had the headers ceramic coated and I don't have a heat shield. No paint damage at all.
Will
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