Who has installed the Vetterman 4-2 exhaust that doesn't exit through the tunnel?
How did you address the tunnel opening? If you closed the tunnel opening did you experience any cooling issues?
Any pictures?
Is there any evidence that the Vetterman exhaust provides better performance than the stock Van's 4-1 exhaust? I'll have an IO390 Thunderbolt engine.
Thanks!
How did you address the tunnel opening? If you closed the tunnel opening did you experience any cooling issues?
Any pictures?
Is there any evidence that the Vetterman exhaust provides better performance than the stock Van's 4-1 exhaust? I'll have an IO390 Thunderbolt engine.
Thanks!