The JP series of pipes are not Junk..I have very good luck with them, The JP4 is a good all around pipe..Heres a few other pipes that have a good reputation..
Go Technology 1/8th EFRA 2047 1/8 Off Road Tuned Pipe w/Manifold..$84

Werks Racing 053 One Piece Tuned Pipe w/Smooth Flow Manifold..$89 Low to mid range

Werks Racing 2013 One Piece Tuned Pipe w/Smooth Flow Manifold..$94 Mid to top end

RD Logics High Performance 1/8 Off Road "Balanced" Tuned Pipe (Buggy/Truggy)..$64

Trinity Adam Drake Picco 069 1/8th Off-Road In-Line Tuned Pipe..$104..good bottom end..

TSAIS 1/8 Off-Road "Competition" Performance Pipe Set..$50..bottom end to mid..

Dynamite Platinum 1/8 053 MidRange Inline Exhaust System (Hard Anodized)..$49..great deal on a good pipe..

Dynamite Platinum 1/8 086 High Speed Inline Exhaust System (Hard Anodized)..$49..great deal on a good pipe..

Dynamite Platinum 1/8 007 High Torque Inline Exhaust System (Hard Anodized)..$49..great deal on a good pipe..

OFNA Jammin JP-3 Hard Anodized Off Road Tuned Pipe..$74..good all around pipe..

OFNA Jammin JP-4 Hard Anodized Off Road Tuned Pipe..$82..good all around pipe..

OS makes some great pipes as well as RB, Novarossi..I did not list the OS pipes for the reason of cost and from what I have read and seen pipes can make a difference in performance but at what point does cost justify a little bit of performance edge over a pipe that cost half..I think it's called diminishing returns..