Hey man, RedThunder1994's car is a '94 A4 Z/28. Since you asked. Pm him or me if you have any questions when installing them.

 

You make some good points, but it is not all about total flow. The biggest advantage of long tubes is the increased torque below the torque peak. Collectors are often lengthened even further to increase the torque below the peak. In a basically stock configuration, these cars just don't put out the power for this issue to be of large significance. Tell me you are going to feel 10 HP just by the seat of your pants or scraping speedbumps just be be 1 tenth quicker in the quarter? That's a tradeoff that only the car's owner will be able to justify. maybe if we were discussing 400 rwhp and greater or a decent increase in cubes the difference would be greater, but not at this level. Just as a point of referance, my 97 WS6 automatic with a complelty untouched long block, stock stall converter automatic runs 13.0s at 107 with SLP shorties, random tech high flow Y pipe (with dual bullet cats) and 4" mufflex. Funny thing is my neighbor who had a 95 Z, stock motor, stick shift went 13.20s at 105 with hooker long tubes, mufflex Y (no cat)and a borla. One would think the 95 would be quicker. It had fewer miles, supposedly better exhaust and a stick. It's the 107 vs 105 that indicates that the shorties and Y pipe are doing a great job. That and I have zero clearance problems, no scraping, no banging, and will pass a sniffer test. There's more than one way to get it done.

 

Yea, I understand what your saying ... I actually dont know that there even would be a peak difference of 10 hp, but like you said, it gives more low end grunt and a little more power throughout the powerband of the motor.

Im not going to say hsorties are junk, cause they definatly do have their place, and they hold their own, but so much of it is in the Y pipe ... If you get shorties and keep your stock Y pipe you wasted a day working on your car cause your not going to notcie much.

 

You're right on the money. Especially the dual cat Y pipe. That driver's side cat is a real pos. Come to think of it, the rest isn't too good either.