brandon@heel.toe.hero

Working with Ninemeister, we now have GT4 RS and Spyder RS OAPs coming WITH resonators. The GT4RS intake sound is already so incredible, our client wanted to add just a touch of exhaust sound without overtaking the intake noise while adding some power.

We will also have the non-resonated version in stock if you really want to scream!

A couple of weeks ago we did our "before" dyno runs, and next week we plan our "after" to compare and see what kind of power we are making with this simple bolt-on.

$2,290 for the resonated version, $300 less without the resonators.

On the regular GT4 we saw 25 lb-ft around 2600-3300rpm at the wheels, which was a huge bump for street driving...hoping for something similar on the 4RS/SRS platform.

cooler2442

Where are these manufactured? Are they the same as these but Ninemeister puts their logo on them? They look very similar.

https://www.aliexpress.us/item/32568...Cquery_from%3A

Asiandude66

the heatshielding looks similar from the pics and link… one never knows…

brandon@heel.toe.hero

Hey guys, negative, these OAPs from Ninemeister are made in the UK. The Chinese knockoffs may look similar, but they certainly aren't the same. The heatshielding for the Ninemeister headers comes in from the Netherlands.

VVG

Are heat shielded and resonated pipes available for the non-RS GT4/Spyder? I can find heat shielded or resonated, but not both.

brandonecpt

My GT4 sounds amazing without the resonators!

brandon@heel.toe.hero

Sending you a message.

RDCR

You should post a pic of the OAPs with no heat shielding.

brandon@heel.toe.hero

I can ask Ninemeister to provide one, but we only receive them finished.

Anything in particular you're looking for in these pictures I can ask them to highlight?

Ksdaoski

What's the internal measurements?

MrFunk

I don't mean to hijack but => GT4 saw a +25 low end WTQ gain with only OAP?!?! I didn't think OAP's produced those kinds of results.

brandon@heel.toe.hero

Yeah, I am looking at my dyno chart now. Stock from 2600-3000rpm I made about 245 ft-lb at the wheels stock. After ONLY OAPs I made 270-275 ft-lbs at the wheels. At 3200 rpm we measured 266 ft-lbs stock and 281 ft-lbs with just the OAPs. We stayed at about 8-15 ft-lbs gain from 3200rpm until about 7000rpm.

My peak torque reading was 300 ft-lbs at about 5700 rpm, peak torque after was 308 ftlbs at 5700 rpm.

brandon@heel.toe.hero

I'll get you that on Thursday when they arrive from the UK. Only looking for measurements on the 4RS pipes or also on the 'regular' GT4/Spyder/GTS pips?

Ksdaoski

4rs. Thanks

RDCR

Welds, OA quality.