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Message: [QUOTE="Peroni, post: 1527760, member: 315"] Besides being quieter there is no blue haze on startup with the hybrids. Power wise feels about the same. EGT's are considerably cooler across the board in all situations. If this were just a street truck then the 175/100 would have been fine. But for towing there is no comparison the hybrids have worked out great for me. 175/30's were from Swamps. After many many miles I sent them to PIS for a checkup and 100% nozzles since everyone had nothing but great things to say about them. In hindsight I should have left them alone, the 175/30's did work out fairly well for me for several years. After my experience I agree with SUPERPSD in that tuning must be critical for larger nozzles, maybe if I got some live tuning things would have been different? But for apparently being so popular one would think tuners would have enough experience to get things pretty close after a few revisions and data logs? I ran GH, Swamps, 123Diesel, Power Struck, Dyno proven, Tyrant, PHP and TDP tuning with same issues despite datalogs and several tweaks. Got so frustrated I sent the 175/100's to a different vendor for a checkup and they came back with no real problems found. I got sick of having such a hard time towing my trailer empty let alone loaded up to 11 tons. Chatted with Dave at Swamps, went with the recommended 200/30 hybrids and haven't looked back. Again just my personal experience. I have read of many guys who are happy towing heavy with a stroke A code w/ 100% or larger nozzles so YMMV. [/QUOTE]