the old ones crack because they werent thick enough..... they were recalled.. so it is a free fix



as far as everything else .... i wouldnt do the timing adjuster,.... instead get a jms chip and they can not only adjust the timing but the air fuel ratios as well ......


and as far as nitrous backfires,... if the bottle pressure is ok and you use a window switch you shouldnt have any problems!


just make sure to have someone who knows what theyre doing check everything if your not sure about it.....(better to ask a stupid question than to make a stupid mistake)