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Funny, I had Lou's guys put mine on, with X-Pipe, Borla 4 tip stingers and the WCC Hurricane ram-air system, and I saw 38 RWHP after tuning (Bull S%^&) and I was extremely lean (around 14.1) so I took it to another buddy of mine (closer to Keller) and we flattened out the dyno results, enriched the air fuel mixture and I actually lost some RWHP, but gained a little torque.
Allot of guys have said the same thing about LG, but all being said, I DO LOVE MY LONGTUBE HEADERS and I wouldn't change the combo I'm running for anything. I think I will stick with my buddy tuning my car from now on though. he doesn't blow smoke up my a$$.
St. Jude Vendor Donor '03-'04-'05-'06-'07-'08-'09-'10-'11
Any time we see low numbers like this there is usually something very basic wrong.
Either a cracked plug, burned wire or crossed 02 wires or even something else that went together wrong on reassembly.
Let me know if we can help but please check out the basics.
On another note, if a car left LGM with 14:1 either my wide band was reading wrong or their wide band was reading wrong.
WE like to let them leave at 12.8 to 13.1
The hurricane intake takes the hot air from the radiator if I am not mistaken. that can mess up the results and even cause knock from the higher Intake air temp that results from sitting still rather than moving down the highway.