whats the best spark plugs??? and whats the best performance mods for $900???

[RedHeartbeat]

I buy mine at Orielly's. Sometimes they have to get them from the warehouse but they do stock them.

[02gmcbandit]

TR6 stock no. 4177? 14 mm taper seat?

[99silveradodude]

im also having problems with my flowmaster and rust had it for only 6 months and its already pretty rusted, love the sound but i should have bought a magnaflow.

[02gmcbandit]

ok i put in the plugs and i swear it seems like it lost power.... i left them gapped at .040 because i kept reading up on them and thats around where everyone else was saying they should be. but i gapped my acdelco's i put in before at .060, should i take these out and regapp them to .060?

[RADO_4U2NV]

ok i put in the plugs and i swear it seems like it lost power.... i left them gapped at .040 because i kept reading up on them and thats around where everyone else was saying they should be. but i gapped my acdelco's i put in before at .060, should i take these out and regapp them to .060?

You want to gap the TR6's at .055 That is the best setting for them.

[CHEVROLADE]

u guys run ngk tr6 on n/a applications thought they were only for f/i?hmm i run the original ac delco iridium,arent they better than them tr6?

[RADO_4U2NV]

u guys run ngk tr6 on n/a applications thought they were only for f/i?hmm i run the original ac delco iridium,arent they better than them tr6?

The NGK's are better than the ac delco's. The TR6's will work with F/I, but better for N/A. If you running spray the best one is the TR55's gapped at about .050 The 55's are a colder plug.