This was the second visit out to Laguna seca with the 4N GT4 build. I am still running the stock rear F8x E diff and as you can see I am constantly fighting this car from the center off. All in all it was a great day of testing I ended up setting a new PB time. I was able set the track record for the F8x chassis 1:36.2. The GPS data was uploaded and posted on fastestlaps.com 

Next year I will be testing a different tire and going with a Drexler clutch type differential. I think between those two I can shave a few more seconds off. 


4N-GT4 Build specs 


Bimmerworld GT-more kit 
MCS 3 way suspension 
Front and rear SPL control arms 
GT4 AP Motorsport front lip 
GT4 dry carbon canards 
4N Motorsport brake cooling ducts 
Sparta evolution brakes 
APR GTC-300 rear wing 
Hoosier R7 315 tires square F&R
Square 18x11 apex wheels 
4N Built S55 engine, Carrillo rods, Mahle powerpak pistons, ported head, supertech valves, ACL bearings 
4N EFR GT8474 EWG turbo kit 800hp 
EOS intake manifold 700cc injectors
E85 tune by wedge Performance 
4N Motorsport Custom roll cage 
Sparco PRO ADV seat 
4N Motorsport in tank fuel pump 
4N turbo back 3.5 titanium exhaust 
Steering wheel Mtrack race parts 





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