Are longer bolts for your 25mm manifold insulators (manifold spacers) to suit an Alloytec required or are they just precaution?

Longer bolts are required and are included in our Alloytec manifold insulator kit at no extra cost. For further details about these and the installation process, please refer to the fitting instructions in the link below:

http://www.maceengineering.com.au/WebRoot/ecshared01/Shops/mace/4E1D/8C2F/7D5F/672B/E9DD/C0A8/D240/2EA6/ALLOYTEC_MI_INSTALLATION_.pdf