i'll agree with the mopar performance springs, leave well alone,
not to mention, when i ordered a customer a set about 6 years ago, they took my money no problem, then when i enquired a few weeks later i was told they were on back order

, ultimately i ended up waiting 4 months for the "order of 100 pairs" to be made up by mopar, and then the idiots sent it by boat instead of plane, as paid for, and the sticker on the springs was made in china
luckily my customer understood it wasnt my fault and still had the springs (i dont know the result regards quality), but mopar, at that point, lost a good customer... me ! i used to buy around ?200-600 a month for a year or two, soon packed that in !
that was just after the time i paid for 2 tins of orange engine spray paint to be added to an order coming by boat, 2 weeks later they arrived seperately on the doorstep, sent some fancy ups way, because only ups would take them on planes, the tins.....?16 each, the shipping..... ?38 !
if i recall, i was using mancini for the springs, not sure where the tins came from now,
grrrrr
carry on folks !