Porsche bosses have asked a Los Angeles judge to dismiss allegations a faulty car part in a Carerra Gt caused the fiery crash which killed actor Paul Walker and his business partner Roger Rodas.

Rodas' widow, Kristine, filed suit against the sports car executives last month (May14), claiming faulty mechanics in the suspension were to blame for the pair's tragic death last November (13), when Roger, who had been driving, lost control of the 2005 vehicle, which burst into flames after slamming into a light pole, instantly killing the two pals.

Kristine also alleged the car lacked a proper "crash cage" and a "racing fuel cell" - a common part in racecars which prevents the fuel from igniting upon impact.

However, Porsche chiefs are now fighting back. In their legal response, lawyers for the luxury car bosses insist the case has no merit because the Carrera Gt is not classified as a "racecar" and therefore would never have been fitted with a fuel cell, because "no ordinary customer would expect a passenger car" to have that feature.

They also argue the plaintiff failed to pinpoint the exact part she believes was faulty, or explain how it caused the car to crash.

They are seeking to have the suit for negligence, wrongful death and product liability thrown out of court, according to Tmz.com.

In March (14), Los Angeles County Sheriff's Department experts and officials at California Highway Patrol officials investigating the car crash ruled the accident was caused by high speed, not mechanical failure, since Rodas was driving between 81 and 94 miles-per-hour in a 45 miles-per-hour zone when he lost control of the sports car.