Get either the GMPP tune or the Trifecta, not both or you are wasting money. The Trifecta costs a lot less and gives you a lot more power - your choice.
Some CAI packages do cause issues - I am not aware that the DDM version does, however.
Just to be clear, the part of the DDM power pack that actually adds power is the tune. The other two components clean up the engine bay and make it look nice but won't add any power.
I have the GMPP as my base tune because I did it when the car was still under warranty. I then added a switchable Trifecta and can confirm that the difference between the two is considerable.
1957 Jamaican MGA
1958 MGA Twincam
1962 MGA Coupe
1971 Jensen Interceptor
2007 BMW Z4M coupe
2009 Pontiac Solstice GXP Coupe
1965 Jensen CV8
1969 MGC roadster,
1969 Lamborghini Islero S
1988 Pontiac Fiero GT
Bill in BC
Last edited by wspohn; 09-13-2018 at 02:23 PM.