Poly bushings will squeak/groan after a while, even if you lube them well. I used the entire tube of silicone grease included with mine when I installed it, but it still groans in colder ambient temperatures. It's a tradeoff of having those stiff poly bushings vs. the quieter, softer rubber ones.
Mk3 |╠╬╝|SGM|203a|Moonroof|17" Paint/Mach Whls|K&N 57S-4000 -snorkel|FFE RMM|Steeda STB, RSB|JBR bushings
Mk1|╠╬╝|Pitch Blk|Prem pkg|Moonroof|SVT Snorkel|SVT Susp|Steeda STS|Z-Eng RMM|Magnaflow exh