ORIGINAL: cold_reboot
I don't know about the Pulse, but the Hangar 9 warbirds were/are known for firewall separations. Hangar 9 may have fixed this by adding tri stock reinforcement, you'll just have to look inside the fuselage when you open it up. I usually reinforce the landing gear area with a few pieces of tri-stock as well
the 2 warbirds from H-9 that I have, P-51 and P-40, both have tri-stock at the firewall/fuselage joint, they seem to have listened/got sick of replacing
planes that have had firewall separation.
when I got mine a couple of years ago, the correction was allready made, after reading alot of the complaints about this issue in the forums it was the first thing I checked when I recieved the airframe before assembling them.