My latest lude my JDM 2.2 pops massive flames from my twin back box. When the exhaust doesn't have a leak that is! When its dark and I'm at high revs in 3rd gear and put it in 4th I can pop flames so big I see them curl up in my side mirrors.
Is this healthy? My mates GTR 32 popped flames and melted his rear brake light. Just wondered if any one else has the same thing or is it just me?
This is my back box:

Mates GTR 32 Melted rear light:
