The Nissan GT-R is obscenely fast even when it's stock, but there are ton of people out there willing to pay big bucks to make it even faster. Unfortunately, one New Jersey GT-R owner recently paid $18,100 and says he got a ruined engine full of broken, damaged parts held together by twine and zipties.



The damage done to Billy Moscato's 2009 GT-R after the build has been documented on the GT-R Life forums. According to a separate mechanic who examined the car and posted his findings on the forum, it was so horrendously bad that it makes the Forged Performance debacle look like a shoddy oil change.



Moscato says the work on his GT-R was done by Xtreme Race Cars in Paterson, New Jersey. Over an approximately two-year period, Moscato told Jalopnik he spent about $90,000 at the shop — which is co-owned by Carl Stevens, Jr., he previously considered a close friend — but this most recent build left the car with a badly damaged, non-functioning engine.



It has also left Moscato out nearly $20,000 and feeling betrayed and lied to by Stevens, he said.



"It's like a slap in the face," he said.



When reached by phone by Jalopnik this afternoon, XRC co-owner Carl Stevens, Sr. declined to comment on the case but insisted he was being "slandered" by the mechanic who wrote the post over at the GT-R Life forum.



"It's slander," the elder Stevens said before hanging up. "The other shop, whoever worked on it, is slandering my name. I have an attorney working on it and that's all I can say right now."



Moscato said that he began bringing his GT-R to XRC around February 2012. He had an assortment of work done and new parts put on the car, but when they did, "It was never treated right," Moscato said. "It never ran right. It never started right."



Still, Moscato kept going to the shop because he trusted Stevens, even though he said friends and family advised him not to. "I thought, 'He's not gonna f*ck me over, I'm his friend," he said.



Moscato said Stevens insisted that the solution was a full engine rebuild, which he agreed to. The goal was to have the GT-R capable of 8-second quarter mile passes. He started paying them for the work in January, he says, and dropped the car off in February.



Moscato picked it up this weekend, and after he and Stevens went for a short drive, he says something immediately went wrong — the oil pressure gauge showed no pressure at all. It soon shut off completely and refused to start, according to his recollection.



Moscato said that Stevens' solution, without even looking at the car, was that it needed new cams, turbos and other parts. He said that at that point he considered selling it, but a friend instead told him to send it to Doug Ross at Weapons Grade Performance, a tuning shop in Connecticut.