I have a Bosch spark plugs in the workshop and I are all well.
I had a previous PRF6T NGK ivan-G and I perfectly.
Now I feel I have pulls into higher gear.
Costs considerably more to the car boot and never had cost him the smallest degree.
If not put a few of iridium or platinum.
But here in Spain recommend putting the candles in the Astra H VXR, I put the NGK recommended chiptune PRF6T-G.
But I do not where to put.
I've seen a lot of BKR6EIX recomendais or BKR7EIX and Courtney too. But PRF6T-G are platinum NGK NGK and will be the same but in platinum is not it?
Are they the best?
Opel Astra Turbo VXR
Universal Intercooler Ebay (mounting)
Stage 2 Vagspped (chiptune spain)
Downpipe 2.5 "Mtech
Exhaust 2.5 "ScSport (Exhaust Spain)
Approx 250 bhp.