What’s the best manifold?

[harrold.x]

Hi guys , is there a big difference on power gains between a tegiwa and a japspeed? Trying to find out the diameter of the tegiwa headers as japspeed state 2.5” , it’s being bolted up to a 3” ktuned catback

 

[carl hammond]

Hi guys , is there a big difference on power gains between a tegiwa and a japspeed? Trying to find out the diameter of the tegiwa headers as japspeed state 2.5” , it’s being bolted up to a 3” ktuned catback

Both are cheap copy items, don't get bogged down and set on the "I have to have a 3" system", get a quality one over the diameter and offers better flow and most importantly no drone throughout the rev range and remember it's not going to be life changing gains anyway that in real life are hardly noticeable in the seat.

DC Sport is a very good header, then if you feel more flush go for a decent branded JDM one over a cheap copy/knock off item imo

For reference I ran the below

DC Sport Racing Manifold (with built in Decat)
Fujitsibu RM01A Manifold Back System (Purchased new from Torque GT June 2018)
AEM V2 Long arm Cold Air Intake located in the front bumper with an Injen Hydroshield
K100 ECU - Mapped by Romain - 214.1whp which is 249.6bhp at the flywheel