I will be installing the DC Headers in about a week and was wondering. Those of you that replaced the delicate bolts on the manifold flange what size is the bolt? I'd like to get a few spares just in case.


Also those of you running the DC Header with the TRD axle-back. How does the combination sound?

 

my manifold bolts were not delicate. they use a 12mm head and are 12x1.5 thred pitch i believe. . just pop one out and run on down to the hardware store to make sure. they have pitch gauges there. i believe the bolts are about 1inch or 1.5 inch long.

 

don't forget about the two 14mm bolts that hook up to the exhaust system. :D

 

Thanks for the responses guys, we will make sure to be cautious even if the car is 3 months old.