Heat Riser Block Off Plates for your F/2F (1 Viewer)

[cruiseroutfit]

Can I assume that these block-off plates are necessary when installing an Exhaust Header?

No, not necessarily. If you have a cracked intake manifold you want it either way, with the stock exhaust or the header. If you don't have a cracked manifold, it certainly wouldn't hurt to have it there but your highly unlikely to crack an intake manifold with the header imo.

 

[Hojasonod]

No, not necessarily. If you have a cracked intake manifold you want it either way, with the stock exhaust or the header. If you don't have a cracked manifold, it certainly wouldn't hurt to have it there but your highly unlikely to crack an intake manifold with the header imo.

Thank you for your answer!