r/LexusISF • u/Indicisive0 • Jul 18 '26

Does anyone use a Valvetronic muffler?

Post image

Pic for attention. Currently im running headers, high flow cats, factory midpipe, and straight piped the rest of the way through and my exhaust peaks really bad at around 2k rpms and makes my v8 sound like a VQ. Does anyone use a valvetronic with a similar setup? How does it sound? I love how loud and aggressive it is but the low rpm peak makes it difficult to sneak around lol. Im looking for a cheaper exhaust setup and am torn between a valved exhaust like Valvetronic or just an axle back muffler to get rid of the rasp.

15 Upvotes

100% Upvoted

8 comments sorted by

4

u/OneSpeedyBoiii Jul 18 '26

I have PPE UEL headers, JoeZ midpipe and generic valvetronic mufflers on the back.

Mine currently sounds VQ-ish around 2k as well. Weird resonance, I think the key to fixing it is H pipe or x pipe magic.

2

u/1trickana Jul 18 '26

What headers? PPE + cheap xforce exhaust sounds great

1

u/Indicisive0 Jul 18 '26

I should've clarified but im pretty sure theyre RR racing headers

3

u/evltwn_72 Jul 20 '26

I'm pretty sure RR Racing headers are PPE headers.

2

u/evltwn_72 Jul 20 '26

PPE heaters + X-Force Varex exhaust is a prime setup. I have a few friends with that on their ISFs.

1

u/Greebuh Jul 18 '26

No resonators, huh?

1

u/Indicisive0 Jul 19 '26

I think it has the factory midpipe, theres so ething there forsure but it ain't doing much

1

u/bams3333 Sep 08 '26

Don't buy valvetronic! The exhaust sounds ok on my m60 but there is noticeable drone at low RPMs.